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CarolloTechnicalProposal-STPUDSecondaryClarifierRehab071619 PREPARFn FnP THE South Tahoe Public Utility District , F ll.- -10W �r�M..: -�_ =Lr--__ - ; _ _ - tiy �-_ _- Y`-fit .".- —y" . _ .�. .: tip dialrirargyp= - 1 - _ F *: - i 4 • ram.:. - =f; AL- .�_ +-" dry Y �,�, } .- Ar- _ .-4, , eA., .. .., _. .. „ . .. . ,.A ' ENGINEERING SERVICES FOR Secondary Clarifier Rehabilitation PROPOSAL I JULY 2019 cp F II Engineers...Working Wonders With Water® c cap rob neap Engineers...Working Wonders With Water& 100 West Liberty Street,Suite 740,Reno,Nevada 89501 P.775.324.4427 July 16, 2019 Mr. Stephen Caswell,P.E. South Tahoe Public Utility District 1275 Meadow Crest Drive South Lake Tahoe,CA 96150 Subject: Proposal for Engineering Services for Secondary Clarifier Rehabilitation Dear Mr.Caswell: The Secondary Clarifiers are a critical link in the District's activated sludge process.The three clarifiers, at around 50 years old, are running up against their remaining useful lives. Improvements are needed to extend the service lives of the clarifiers,reduce future maintenance costs, and improve process reliability.Project challenges include the limited time available to fix Clarifier 1 (the clarifier in the worst condition), seasonal timing constraints, sequencing to maintaining reliable process operation safely, and budgetary limitations. We believe our team has a unique combination of attributes to make your project successful: previous work for the District, a local team, and recent clarifier rehabilitation experience.Carollo has completed similar projects for the cities of Richmond (through Veolia Water), Daly City, and San Jose,California, and the City of Dallas, Texas. The Carollo team was selected to apply focused expertise with secondary clarifier upgrades and pre-purchasing of equipment.Key team member qualifications include: • Scott Parker—Principal-in-Charge (29 years of experience). Scott has completed several successful projects for STPUD including the Big 5 Pump Station Condition Assessment,Twin Peaks Pump Station and Water Line Replacement, and Headworks Replacement Project.He has built his career on providing high quality designs for wastewater facilities throughout California,one of which included emergency repairs to a secondary clarifier in Chico. • Mike Britten—Project Manager (45 years of experience).Mike relocated to the Reno office from our Walnut Creek office.He recently completed his role as"liquids package"manager for the San Jose Regional Wastewater Facility CIP,which included managing the$40 million nitrification clarifier rehabilitation project. Prior to San Jose,Mike was responsible for several designs that involved secondary clarifiers for the cities of Turlock,South San Francisco, Half Moon Bay,Daly City, and Richmond. • Richard (Ricky) Gutierrez—Project Engineer(15 years of experience).Ricky, also Reno-based,has a broad range of experience with wastewater design and construction projects. Ricky recently completed his role as project manager for the Sacramento Regional County Sanitation District Return Activated Sludge (RAS) Pumping System Project.He was responsible for developing bid packages for pre-purchasing 48 individual RAS pumps that were turned over to the contractor for installation. Thank you for the opportunity to continue providing services to STPUD.We are eager and ready to assist the District in completing this important project. Please let us know if you have any questions concerning our proposal or if you need any further information. Carollo Engineers takes no exceptions to the District's Standard Consulting Agreement. Sincerely, C ROLLO ENGINEERS, INC. %pi 1 1 y Michael J. Brit e , P.E. Sco t E. Parker, P.E., BCEE Project Manager Principal-in-Charge 300.84.STP004 I STPUDCoverLetter071619.docx - �I W AT E R OUR FOCUS OUR BUSINESS — — OUR PASSION TABLE OF Contents I'; 7. 1 -. x' 1 . • v.'- - •fit:"� - • . '-. ,2t4 r rr- :_•._: :: '''_. LP * ,t'I p of " 3.' Technical Proposal 1. Firm Experience 2. Firm's Approach to Project 3. Project Team 4. Nanhour Estimate 5. Information/Document Needs Appendix Appendix A. Sample Work Product Appendix B. Resumes .�. ;ems--. - m. :r ` - ;j TECHNICAL PROPOSAL 40. WATER AND WASTEWATER EXPERTS • Biosolids pumping, thickening, digestion, dewatering, VirATER Founded in 1933, Carollo and reuse • OUR FOCUS Engineers is an environmental Odor control facilities OUR BUSINESS engineering firm specializing in Secondary Clarifiers OUR PASSION planning, design, and construction Carollo has extensive experience in evaluating, management of wastewater and optimizing, and designing secondary clarifiers with similar water treatment facilities.We have provided these services features outlined in your request for proposals (RFP). for improvements to treatment facilities ranging in size These features include weir placement,weir and launder from less than 1 mgd to more than 300 mgd in capacity. cleaning systems, scum removal, optimization of square Carollo's sole focus is to provide water and wastewater and round clarifiers, and process assessment.We also have services for agencies such as yours.Because this is all we experience with collector mechanism design, flocculating do, our success is driven by our ability to provide well design, energy dissipation inlet design, and hydraulic/ innovation and leadership in all of the areas that drive our density current assessments. industry. Cities, utilities,public agencies, and special districts of Some of the innovative tools and methods we use to design, evaluate, and optimize secondary clarifier all sizes count on Carollo to help them navigate the increasingly complex challenges of cost-effectively and performance include detailed hydraulic analysis, sustainably protecting public health; meeting local, state, computational fluid dynamic (CFD) modeling, stress and federal regulatory requirements; protecting the water testing, velocity profile testing, and state point analysis to assess and address clarification and thickening problems. environment; and addressing public expectations. Our core philosophy for success is to work collaboratively with SAMPLE WORK PRODUCT our clients to find the best ways to protect and enhance our public water supplies and environment. As requested,we have provided a sample work product from the Richmond Wastewater Treatment Plant Carollo is a recognized leader in developing innovative Critical Improvements Project in Appendix A.This solutions to address wastewater related issues facing project had elements similar to your Secondary Clarifier public agencies.We have provided planning, design, and Rehabilitation project and involved team members Scott construction-phase services for many new and improved Parker, Mike Britten, and Mike Dadik.The first sample is wastewater treatment facilities. Our experience includes: a Project Memorandum that summarizes the CFD model • Facility planning/master planning results from an evaluation of increasing secondary clarifier • Headworks facilities, including influent screening, grit capacity.The second sample is a partial set of plans removal, and pumping depicting the scope of work for replacement of secondary • Flow equalization clarifier mechanisms and structural modifications. • Primary clarification and secondary clarification • Secondary treatment using fixed film and suspended RELEVANT AND RECENT PROJECTS growth treatment processes for BOD/ammonia removal The table on the next page highlights some of Carollo's • Biological nitrogen and phosphorus removal experience with secondary clarifier design. It is followed by • Disinfection using chlorine gas, sodium hypochlorite, detailed descriptions and references for projects completed low and medium-pressure ultraviolet (UV), and ozone within the last five years that are directly applicable to the • Tertiary filtration District's Secondary Clarifier Rehabilitation.We invite • Digester gas reuse (e.g., cogeneration) you to contact these references to verify Carollo's quality and responsiveness on similar projects. TECHNICAL PROPOSAL B:\Pursuits\Client84(SAC)\STPUD\SecClarifierRehab\Prop0719\Indd\01-TechProposal.indd v Secondary Clarifier Design Experience " = s - �c E v v Project Client Project v Q a ¢ o 0 0 Cost = = Richmond Wastewater Treatment Plant Critical Improvements I Veolia Water $4.5M V V V Secondary Clarifier No.5 and Denitrification I City of Turlock,CA $18M 6/ 6/ Water Pollution Control Plant Rehabilitation Reliability Upgrade I City of San Leandro,CA $41M p/ `/ V V V Temecula Valley Regional Water Reclamation Facility I Eastern Municipal Water District,CA $15M VVVVVV Southwest Water Reclamation Facility Clarifier Rehabilitation I Manatee County,FL $4M V V V V V Central Wastewater Treatment Plant Major Maintenance and Rehabilitation Improvements I $19M 6/ `/ 6/ 6/ 6/ 6/ Dallas Water Utilities,TX South San Francisco/San Bruno Water Quality Control Plant I City of South San Francisco,CA $30M 6/ g/ 6/ `/ 6/ Secondary Treatment Facilities Expansion I Fairfield-Suisun Sewer District,CA $22M u/ 1/ `/ Water Pollution Control Plant 12-mgd Expansion I City of Chico,CA $46M 6/ g/ 6/ g/ 6/ Secondary Clarifier Improvements I North San Mateo County Sanitation District,CA $31M p/ g/ `/ V V Secondary Treatment Improvements I Orange County Sanitation District,CA $8M VVVVVV Pleasant Grove Wastewater Treatment Plant Expansion I City of Roseville,CA $31M VVVVV PAR 942 North Secondary Clarifiers I Metro Wastewater Reclamation District,CO $55M i/ V V/ V V/ Fresno-Clovis Regional Wastewater Reclamation Facility Organic Upgrades]City of Fresno,CA $111M 6/ g/ 6/ g/ 6/ Richmond Wastewater Treatment Plant Critical Improvements, Veolia Water,CA Carollo provided design and engineering services during with a modern and energy-efficient diffused aeration construction for Veolia Water's Critical Improvements system. The upgrades resulted in improved secondary to the Richmond Wastewater Treatment Plant. Design clarifier process performance. objectives included: • Replace aging, failing, and inefficient facilities that are essential to grit, BOD, and TSS removal • Improve the wastewater treatment plant's overall ,. 74,' reliability with respect to grit, BOD, and TSS ---- removal • Reduce health and safety impacts to plant staff Secondary clarifier improvements included : r. replacement of the secondary clarifier mechanisms and structural modifications to optimize performance by f replacing infrastructure that was in very poor condition and did not provide adequate, safe access to the clarifiers. The project also included new screening and grit removal improvements and aeration upgrades. A fine screening system with mechanical bar screens and a POINT OF CONTACT » Mr.Ryan Smith,Director of Water Resource vortex grit removal system provides additional screening Recovery,Phone 510-620-5486 of rags and debris that pass through to downstream Email ryan_smith@ci.richmond.ca.us processes. Mechanical surface aerators were replaced COMPLETION DATE » June 2019 TECHNICAL PROPOSAL B:\Pursuits\Client84(SAC)\STPUD\SecClarifierRehab\Prop0719\Indd\01-TechProposal.indd r # 1 San Leandro Water Pollution Control Plant Rehabilitation, City of San Leandro,CA __ Carollo provided planning and design services for —` - - $51 million in improvements to San Leandro's Water V� �* _ = Pollution Control Plant to accommodate a dry weather flow capacity of 7.6 mgd and a peak wet weather i` r , flow capacity of 27.5 mgd.The project involved flow/ load estimates, analysis of unit process performance, . ..,_ . ":-': and condition assessment of various structures. ' {r Design included raw sewage pumping,mechanical r•` screening/handling,grit removal/processing/handling, , f primary clarifiers,flow equalization facilities, odor control, secondary clarifier rehabilitation, digester Secondary Clarifier No.5 and Denitrification Facilities, rehabilitation, and other improvements. Project City of Turlock,CA highlights include: For more than 25 years, Carollo has assisted The City of • Improved aesthetics and odor control Turlock with design and construction of new facilities • Reduced risk of sanitary sewer overflows by restoring to meet California Title 22 tertiary recycled water plant capacity and increasing wet weather capacity requirements and to provide flexibility to discharge • Simplified operations and maintenance by increasing domestic effluent to the river year-round or off site to reliability and providing redundancy recycled water customers. Carollo has also completed • Maintained plant operations during construction by several permit-related projects,including NPDES phasing improvements and specifying shutdowns/ compliance study, effluent toxicity study, ammonia constraints in conjunction with plant operations toxicity study,THM reduction pilot-plant studies, and • Provided new LEED-certified administration building alternative disinfection studies. for plant, operations, and laboratory personnel • Carollo provided planning, design, construction Ensured seamless project funding by securing a low-interest State Revolving Fund loan management,bidding services, and engineering services during construction for a new (fifth) secondary • Saved capital cost and ensured compact footprint clarifier at Turlock's Regional Water Quality by implementing flow equalization and repurposing abandoned tanks Control Facility to increase capacity and improve secondary treatment performance. The$18 million M= .., . project converted seven aeration basins to achieve denitrification of the plant effluent to meet the new 10 -,.e- _ discharge permit limit for nitrate plus nitrite of 10 ma . 111L- ft;;_ (as N). '‘i —� , . ,._ 0 L I Other project design elements included a mixed liquor T flow distribution structure,return activated sludge - (RAS) pumping station and flow-paced RAS control, scum pumping station, additions and modifications to �- electrical and instrumentation systems, and associated �. ' yard piping and paving and grading improvements. Preliminary design included a detailed comparative , evaluation of recent clarifier technology improvements. Carollo is now managing the construction and startup for the project. POINT OF CONTACT » Mr.Stephen Fremming,Project Manager POINT OF CONTACT » Mr.Justin Jensen,WPCP Plant Manager Phone 209-668-5599 Phone 510-577-3434 Email sfremming@turlock.ca.us Email jjenson@sanleandro.org _ COMPLETION DATE » July 2019 COMPLETION DATE » September 2018 TECHNICAL PROPOSAL 4 B:\Pursuits\Client84(SAC)\STPUD\SecClarifierRehab\Prop0719\Indd\01-TechProposal.indd r Southwest Water Reclamation Facility Clarifier Rehabilitation, I 1 Manatee County,FL . , �f The Southwest Water Reclamation facility has a "�b" =- permitted capacity of 22 mgd and has experienced - i - significant deterioration.The four secondary clarifiers' ` R ``2a mechanisms and headworks equipment are more than J - ,-. + ._ 20 years old and beyond their useful life. Much of the equipment and concrete affiliated with the headworks is . deteriorated and in need of restoration or replacement, and the scum ejector equipment for Clarifiers 3 and 4 are no longer operational.Carollo was retained to design San Jacinto Valley Regional Water Reclamation Facility the following components: Expansion,Eastern Municipal Water District,CA • Rehabilitated headworks facility, including structural rehabilitation, channel modifications, new screenings Carollo provided planning,preliminary design, final conveyors, and new grit classifier and removal system design, and construction services for a comprehensive • New clarifier mechanisms and effluent launders for plant expansion to 14 mgd for the San Jacinto Valley Clarifiers 1 through 4 Regional Water Reclamation Facility,which had only • New variable frequency drives for RAS Pump Nos. 2, secondary treatment capabilities.The first project phase 4, 5, and 6 involved design of$13.8 million in new secondary • New scum pumping systems for Clarifier 3 and 4 effluent equalization and tertiary treatment facilities • New electrical, instrumentation, and controls wiring to provide Title 22 approved reclaimed water. The and conduits to support new/rehabilitated facilities tertiary facilities included cloth-media disk filters, alum chemical facility, and return water pump station.The Carollo designed the project in multiple phases to allow existing chlorine contact basins and effluent splitter the plant to be in operation while improvements were box were modified to provide contingency measures for constructed.The headworks upgrades were designed out-of-compliance effluent, as required by Title 22. to maintain facility operation by isolating individual channels. Replacement of the clarifiers'mechanisms, The subsequent Tertiary Treatment and Plant 2 screenings conveyors, and grit classifiers dramatically project provided a new headworks facility with bar improved plant reliability and efficiency.New scum screens and vortex-type grit removal system; two pumps allowed the City to eliminate the scum wet 100-foot-diameter circular primary clarifiers; aeration wells,which had been a source of odors and problematic basin for nitrification-denitrification;blower building; operations and maintenance.The new variable three 125-foot-diameter circular secondary clarifiers; frequency drives improved operational efficiency and primary sludge, RAS/WAS, and scum pumping; will prolong the life of the existing pumps. secondary treatment polymer facility; additional cloth-media type tertiary filters; tertiary chemical building; flocculation basins; out-of-compliance and tertiary effluent storage ponds; filter influent pump - station modifications/additions; utility water and tertiary --__ - -- effluent pump station; aeration basins and WAS pump _-- __ , station improvements; standby power generation facility; _ ' ' taili--. • chlorine contact tank; soil filter type foul air scrubbing �i �� system; two return water pump stations; expansion of 9V iP-- biosolids handling processes; and a 10,000-square-foot 1 r - operations and maintenance building. -___ / _ , POINT OF CONTACT » Mr.Charles Bachmann,Assistant General Manager of Engineering POINT OF CONTACT » Mr.Jeff Streitmatter,Project Management Phone 951-928-3777 Division Manager,Phone 941-708-7450 Email bachmannc@emwd.org Email jeff.streitmatter@mymanatee.org COMPLETION DATE » September 2015 COMPLETION DATE » December 2017 TECHNICAL PROPOSAL B:\Pursuits\Client84(SAC)\STPUD\SecClarifierRehab\Prop0719\Indd\01-TechProposal.indd 2. Firm's Approach to Project From our discussions with the District, we have developed Since the 2013 assessment, the District has found other an approach that will meet your long-term needs for deficiencies: reliability and process performance. Our objective is • The drive for Clarifier 1 is failing, and there are holes to collaborate with your operations and maintenance in the sludge collector arms.The clarifier mechanisms (O&M) team to identify needed improvements and were manufactured by Dorr Oliver,which has long been prioritize them according to criticality, cost, and time out of business. Replacement parts are not available and requirements.We will help the District develop a project must be custom manufactured.To maintain operational reliability, rehabilitation of Clarifier 1 should receive that makes business sense from a life-cycle perspective and one that will not jeopardize continuous operation of the highest priority. Replacing just the drive may not be the secondary clarifiers and the District's ability to meet feasible, so it is likely that the entire sludge withdrawal discharge permit requirements throughout the year. mechanism will need to be replaced. • The clarifier drive platforms for all three clarifiers are PROJECT UNDERSTANDING unusually small and the "dog house"weather enclosure on the center is very cramped. Snow also accumulates The District's wastewater facility includes three secondary on the walkways to all of the clarifiers making access clarifiers. Clarifier 1 is 53 years old and has been used difficult and hazardous in the winter. exclusively for conventional secondary sedimentation • The activated sludge process experiences episodes of of the mixed liquor process stream. Clarifier 2 is also 53 poorly settling mixed liquor solids. Sludge volume index years old, and Clarifier 3 is 47 years old. Clarifiers 2 and (SVI) values can peak as a high as 600.A well-settling 3 were originally designed to provide a second stage of sludge has SVIs of around 150.At high SVIs, the sludge blanket does not consolidate well and the solids can rise clarification assisted by chemical addition.Therefore, to near the height of the overflow weirs. If the sludge the interior concrete surfaces and sludge collection blanket were to carry over the weir, the solids would mechanisms for these clarifiers were exposed to a overload the downstream filters and increase the risk of somewhat corrosive environment.Clarifiers 2 and 3 are discharge permit violations. Peak flows exacerbate this also about 3 feet lower than Clarifier 1.The District now condition. operates Clarifiers 2 and 3 as conventional secondary • The clarifiers do not have a peripheral baffle plate clarifiers (without chemicals) in parallel with Clarifier 1. just upstream of the overflow weirs. Hydraulic Because all three clarifiers operate at different elevations, improvements, such as internal baffles, may be needed the flow must be regulated to provide an even distribution to improve flow patterns and settling performance. of flow and solids loadings. CFD modeling is the best tool for optimizing The District performed a condition assessment of the performance and identifying specific improvements. treatment plant, including the secondary clarifiers, in A key challenge for this project is to complete 2013. Findings from the assessment are summarized in the improvements for Clarifier 1 by the end of the 2020 following table. construction season,which ends October 31.The figure on the next page is a conceptual project schedule. Condition Assessment Findings Approximately nine months are needed for submittal review and fabrication/delivery, plus another two months Repairs Area Condition Recommended for installation of the equipment. In addition, the foundation for the center column appears to be too small Concrete Floors Hollow areas between Replace grout layer to support a new center column designed for current grout and slab seismic codes. Replacing the mechanism will trigger the Rake Arms Exterior rust with no Repair steel and coat with need to comply with current structural codes. Based on surviving coating epoxy our experience, the foundation will likely need to be Center Column Exterior rust with no Repair steel and coat with replaced with a new slab designed for the required anchor surviving coating epoxy bolt embedment and to resist over-turning. Sufficient time Weirs Coating on steel weirs Replace with FRP weirs needs to be allocated for the seismic analysis and design of is intact the foundation modifications. Catwalk/Bridge Galvanized steel with None required for at least failing coating 10 years TECHNICAL PROPOSAL 6 B:\Pursuits\Client84(SAC)\STPUD\SecClarifierRehab\Prop0719\Indd\01-TechProposal.indd 2019 2020 TASK SONDJFMAMJJAISO Design Notice to Proceed (9/5/19) ♦ Data Collection and Review Collect and Review Data Preliminary Site Investigations Design Survey Clarifier Floors and Walls Clarifier Center Column Sesimic Analysis CFD Analysis Develop and Evaluate Alternatives Prepare Design Memorandum (30% Design) Prepare 90% Design Prepare Final Contruction Documents y (2/14/20) Bidding Services Contract Award Construction Notice to Proceed 1 ♦ Complete Rehab Clarifier 1 (10/31/20) ♦ Pre-Purchase Documents(Optional) Pre-Purchase Workshop Draft Pre-Purchase Bid Package Ell Final Pre-Purchase Bid Package Bid Period 1 mm Pre-Purchase Contract Award Pre-Purchase Contract NTP . Submittals Fabrication and Delivery—Clarifier 1 Mechanism Installation by Contractor Meetings/Workshops Kickoff Meeting ♦ Design Memorandum Review ♦ 90% Design Workshop ♦ Deliverables (not including pre-purchase deliverables) Design Memorandum (30% Design) ♦ 90% Design Submittal and Cost Estimate ♦ 100% Design Submittal and • Cost Estimate Preconstruction Conference Agenda • and Notes Addenda (as required) Bid Analysis Memorandum ♦ Ir TECHNICAL PROPOSAL B:\Pursuits\Client84(SAC)\STPUD\SecClarifierRehab\Prop0719\Indd\04-Schedule.indd As described in more detailed under the Approach APPROACH section,we propose a separate parallel task for Our overall approach will be to fast-track procurement of pre purchasing and installing the Clarifier equipment. the clarifier mechanism for Clarifier 1 while continuing The mechanism for Clarifier 1 would be procured on a to design improvements for all three clarifiers. Clarifier 1 fast track basis.The other two clarifiers could be delivered would be fully rehabilitated (including new mechanisms) later for the following construction seasons.All three in 2020. Clarifiers 2 and 3 would be rehabilitated at clarifiers should be procured from a single manufacturer the rate of one clarifier per season over 2021/22 and for uniformity and all three clarifier mechanism would be 2022/23, respectively.This approach would allow time to installed under a single construction contract.The key pre-purchase,fabricate, and deliver the sludge withdrawal to meeting the October 2020 deadline is to accelerate mechanisms.The benefits of pre-purchasing the clarifier the schedule for the seismic analysis, new center column mechanisms for all three clarifiers would be uniform foundation design,preparation of the equipment equipment for all three clarifiers, the ability to design to pre purchase bid package, and manufacturer selection. the details provided by the selected manufacturer, and This will require a collaborative effort between the locked-in costs. Limiting the rehabilitation to one clarifier District and Carollo. per year would reduce the District's risk of discharge After the first push to meet the October 2020 deadline permit violations during peak loading events, such as the for Clarifier 1, it may be prudent to spread out the time July 4th weekend. for replacing the clarifier mechanisms for Clarifiers 2 Based on our current understanding, we propose the and 3. Consideration should be given to completing the following scope and timeline for clarifier improvements. rehabilitation at the pace of one clarifier per year to allow time for critical decisions,reduce the risk of clarifier Clarifier 1 (2019/2020) overloading and potential effluent discharge violations, • Pre-purchased clarifier mechanism (possibly for all three and develop District funding strategies. clarifiers) • One of the key decisions to be made is whether new Concrete wall repairs and coatings mechanisms should be installed for Clarifiers 2 and 3 or • New grout topping on the clarifier floor whether they should be rehabilitated in place. Our team • New sludge withdrawal mechanism spot and center will perform a life-cycle cost and risk analysis to assist the column foundation District in making this decision. Some of the issues to be • Performance improvements such as a peripheral baffles evaluated include: and new fiberglass weirs • The life span of a rehabilitated mechanism should be Clarifiers 2 and 3 (2021-2023) compared to that of a new mechanism. • Concrete repairs and coatings and performance • Installing a new grout topping on the clarifier needs improvements to be done with the new (or existing) mechanism in • Replacement of the sludge withdrawal mechanisms, place so it can be swept in to meet clearance tolerances walkways, and platforms (if desired by the District) or, between the floor and the sludge collector arms. If if new mechanisms are not provided, spot repairs and the grout layer were to be replaced using the existing coatings on the existing mechanism mechanism, it would likely need to be replaced again when the new mechanism is installed. • New grout topping layer • Consideration should be given to replacing the • Improvements to the RAS pump stations, if required mechanisms with a more modern system.A • New foundation for center columns designed to match suction-type system would be more efficient in removing the details of the vendor submittal (if required) the sludge blanket and preventing it from rising to • Potentially, improvements to the groundwater relief dangerously high levelsT. However, the current design of system the RAS line draw-off may preclude a suction draw-off system. Task 1 — Data Collection and Review • Converting to a suction header system may require This task will involve establishing baseline conditions modifications to the RAS pumps. for the three clarifiers.As-built drawings and previous condition assessments will be reviewed, along with historical performance data over the past few years. Performance data needed includes mixed liquor SVI values, secondary effluent quality (BOD and suspended TECHNICAL PROPOSAL B:\Pursuits\Client84(SAC)\STPUD\SecClarifierRehab\Prop0719\Indd\01-TechProposal.indd solids), and influent loadings (flow and mixed liquor • Pre-purchasing of clarifier mechanisms suspended solids). Influent loadings will be correlated with • Cost estimates and cash flow analysis effluent quality to establish loading limitations, especially • Hydraulic improvements based on CFD analysis during peak months.This will be used to develop timing • Concrete repair/coating methods constraints for the clarifier rehabilitations.This data will also be used to input to a CFD model to evaluate the need • Potential modifications to the groundwater relief system or recommended procedures when a clarifier needs to for hydraulic improvements. be emptied In addition, our team will review groundwater level 2.5—Alternatives Evaluation Workshop data (if available) and previous geotechnical reports. This information will be used to assess the effects of Our team will conduct a workshop with the District to groundwater uplift pressures on the clarifier floor slab and review the alternatives analysis and recommendations. determine if groundwater dewatering would be required to The desired outcome of the workshop will be the scope construct the new center column foundation. of the rehabilitations,project phasing/schedule, and cost estimate. Results from this workshop will be the Task 2 — Design framework for pre-purchasing the clarifier mechanism for 2.1 Site Investigations and Survey Clarifier 1 and potentially for the other two clarifiers (see Under this task, our team will perform a spot survey to Task 2.6). check that the tops of the clarifier walls are level and 2.6— Design Memorandum the clarifier floors are sloping uniformly as originally The Design Memorandum will summarize the results of constructed. In some instances, clarifier floors can bulge the alternatives workshop and baseline conditions.The if subjected to unrelieved groundwater pressures. Spot memorandum will be the basis for design and will be checks will be compared to the District's 2016 aerial developed to approximately the 30 percent design stage. survey of the site. 2.7— Basis of Design Workshop In addition, we propose to add CFD analysis to identify A workshop will be conducted with the District to review any deficiencies with the flow patterns and velocities in the Design Memorandum and confirm the basis for the clarifiers and identify possible improvements. completing the 90 percent design. 2.2 Condition Assessment 2.8—90 Percent Design Documents A detailed condition assessment will be conducted The 90 percent design will be submitted to the District for by our subconsultant,JDH Corrosion Consultants, review.A workshop will be held to review the design and Inc.The condition assessment will include visual and incorporate comments for the final 100 percent design. non-destructive concrete testing and ultrasonic testing of The 90 percent cost estimate will also be presented. steel structures. Results from the assessment will be used Details of the pre-purchased clarifier mechanism submittal to develop the scope of the clarifier rehabilitation. will be incorporated in the design. 2.3 Seismic Analysis and Groundwater Uplift Analysis Task 3 —Construction Documents (100 Percent A structural analysis will be performed to determine the Design) need for a new center column foundation if a new clarifier mechanism is installed. In addition, the clarifier walls will Final documents suitable for bidding will be prepared, including drawings, specifications, and final engineer's be evaluated for compliance with current seismic codes. estimate. It is assumed that the construction documents An analysis of groundwater uplift forces and potential will encompass rehabilitation of all three clarifiers and the pressure relief system improvements will be conducted. clarifier mechanisms will be pre-purchased by the District 2.4—Alternatives Development and Evaluation and assigned to the successful bidder for installation. Our team will work with the District to identify the project's objectives and focus the alternatives analysis on Task 4— Bidding Services solving the most important issues. Potential alternatives to This task will include attending the pre-bid conference be evaluated include: and providing clarifications to questions from bidders by • Scope for rehabilitating the sludge withdrawal preparing addenda. In addition, our team will provide a bid analysis summary to provide the basis for the District mechanisms—i.e., spot repairs and coatings versus all new mechanisms to determine responsiveness of the bidders. TECHNICAL PROPOSAL B:\Pursuits\Client84(SAC)\STPUD\SecClarifierRehab\Prop0719\Indd\01-TechProposal.indd Task 5 — Project Management The District may need to fund some portion of the Project management services will include resource pre purchase contract to allow for the vendor's effort to management and preparation of monthly reports. develop the submittals and expedite approvals. OPTIONAL SERVICES Task 7 —CFD Modeling Two-dimensional dynamic CFD modeling will be The following tasks will be completed if authorized by the performed for the current clarifier configurations to District. identify flow velocities and improvements to enhance Task 6— Pre-Purchase Documents settling. Results from the analysis will be summarized in a brief technical memorandum. 6.1 Scoping Workshop.Given the time constraints for Clarifier 1, it will be necessary to pre-purchase the clarifier DELIVERABLES mechanism to gain time over the conventional contractor- procured method.We propose to hold a workshop to The following deliverables are proposed: discuss the procurement approach. Minutes from the • Design Memorandum, draft and final versions workshop will be the basis for developing the pre-purchase • Clarifier pre-purchase workshop meeting notes documents.The objectives of the workshop include: • Clarifier pre-purchase package specifications • Confirm the scope of repairs for Clarifier 1, including • Review comments for the clarifier submittal needs for seismic upgrades and concrete coatings • 90 percent design submittal for the overall installation • Identify a short list of at least three manufacturers to be contract, including plans, specifications, construction named in the pre-purchase documents constraints, and cost estimate • Identify needs and materials for the new catwalk, center • Final contract documents suitable for bidding and a platform, and center column final engineer's estimate • Identify needs for the new center column foundation • Meeting agendas and notes • Decide whether new mechanisms for Clarifiers 2 and 3 • Addenda (three assumed) will be included in the pre-purchase contract • Establish a budget estimate and schedule for the pre-purchase contract • Determine terms of the pre-purchase contract: full pre- purchase of the equipment including full payment by the District, or payment only for submittal preparation and assignment of the clarifier contract to the installation contractor • Identify District front-end specifications/conditions for a pre-purchase contract 6.2 Pre-Purchase Package. Carollo will prepare pre-purchase package specifications and guide drawings suitable for bidding by vendors.The pre-purchase package will be prepared in draft and finalized with the District's comments. 6.3 Bidding Services for Pre-Purchase Contract. Our team will answer questions during the bid period and prepare addenda as required.We will also evaluate the vendor bids for responsiveness. It is assumed that the District will conduct a pre-bid conference is required. 6.4 Review Vendor Submittals.This step is critical for maintaining the fast-track schedule. Our team will provide technical review of the clarifier submittals in parallel with the District's team from engineering, operations, and maintenance.The vendor can begin fabrication once approval of the submittals is issued by the District. TECHNICAL PROPOSAL 9 B:\Pursuits\Client84(SAC)\STPUD\SecClarifierRehab\Prop0719\Indd\01-TechProposal.indd Carollo's team brings a proven track record of developing SENIOR LEADERSHIP YOU CAN TRUST successful solutions to complex wastewater treatment Superior leadership provides credibility for all of your challenges.We have a strong history with clients technical decisions and ultimately translates into better throughout California and will use this experience to outcomes for the District. Our project team brings help the District make sound decisions and deliver an knowledge gained from years of experience. In addition, innovative design that optimizes your future investment. our team has proven experience with a wide range of Our key team members'local presence and connectivity to secondary clarifier design projects at other locations to the South Lake Tahoe area foster successful collaboration give you confidence that we will provide state-of-the-art from design through construction. rehabilitation of your secondary clarifiers. Mike Britten,PE I Project Manager -- . Tel:775-324-4427 1 Email:mbritten@carollo.com °we.. 195v- °L...i: „--, Mike has 45 years of experience in planning Stephen Caswell,PE f / and design of wastewater treatment plants, PROJECT MANAGER with an emphasis on expansion and upgrade of existing facilities. He recently completed his role as program PRINCIPAL-IN-CHARGE manager for the$40 million San Jose Nitrification Scott Parker,PE,BCEE Clarifier Project,which involved rehabilitation of 16 PROJECT MANAGER 140-foot-diameter clarifiers.Many of the issues facing the Mike Britten,PE* District were addressed in the design,including concrete repairs,new grout toppings, groundwater relief valves, and PROJECT ENGINEER new sludge withdrawal mechanisms. Mike was also project Ricky Gutierrez,PE* manager for secondary clarifiers at the City of Turlock, Sewer Authority Mid-Coastside (Half Moon Bay), City CFD MODELING STRUCTURAL/COATINGS of South San Francisco, and Veolia Water/Richmond Ed Wicklein,PE Mike Dadik,PE,SE Wastewater Treatment Plant. As project manager, Mike will be responsible for overall ELECTRICAL/I&C PRE-PURCHASE PACKAGE implementation of the technical aspects of your project. Daniel Robinson,PE Eric McGrath,PE* He will also be responsible for meeting the budget and SURVEYING CONDITION ASSESSMENT schedule, control of project activities, commitment of Kevin Heeney,PLS z Darby Howard,PE 2 resources, and technical accuracy of the work. He will also serve as principal liaison between Carollo and the District *Reno Based throughout the project. 'CTA Engineering&Surveying zJOH Corrosion Consultants,Inc. Scott Parker,PE,BCEE I Principal-in-Charge/ Technical Advisor Key Team Member Percent Commitment - Tel:916-576-4720 I Email:sparker@carollo.com Availability Available for to Other Scott has more than 29 years of experience This Project Projects with a wide array of planning, design, and construction Mike Britten,Project Manager 25% 75% projects for wastewater treatment and conveyance. Scott Parker,Principal-in-Charge 10% 70% He is well known to the District, having served as and Technical Advisor principal-in-charge for the Big 5 Pump Station Condition Ricky Gutierrez,Project Engineer 35% 65% Assessment,Twin Peaks Pump Station and Water Line Replacement, and Headworks Replacement.Scott will Ed Wicklein,CFD Modeling 25% 75% have ultimate responsibility for your project. He will Mike Dadik,Structural/Coatings 20% 80% participate in all contract matters and monitor procedures Daniel Robinson,El&C 20% 80% for quality control and project progress. Scott will support Mike to maintain the budget, schedule, and commitment Eric McGrath,Pre-Purchase 20% 80% Package of resources. TECHNICAL PROPOSAL 10 B:\Pursuits\Client84(SAC)\STPUD\SecClarifierRehab\Prop0719\Indd\01-TechProposal.indd - Ricky Gutierrez,PE I Project Engineer - Daniel Robinson,PE I Electrical/Instrumentation if Tel:530-312-1330 I Email:rgutierrez@carollo.com &Controls(El&C) Ricky has 15 years of experience in a broad Daniel has 20 years of EI&C systems range of projects involving planning, design, experience,including SCADA and control and construction of wastewater treatment facilities,water systems analysis and design; variable frequency drive, treatment facilities,pipelines, and pump stations.As reduced voltage soft starter, and full-voltage motor control project engineer, Ricky will be responsible for discipline design; programmable logic controller/control panel design; coordination and day-to-day engineering of your project to control systems architecture; serial, Ethernet, and radio produce the plans, specifications, and cost estimates. communication;process instrumentation requirements; and UL,NEC,NEMA, and NFPA 70E requirements. STRONG DISCIPLINE SUPPORT Eric McGrath,PE I Pre-Purchase Package Discipline support will be provided by experienced Eric is a civil engineer with more than 32 professionals who have completed projects of similar size years of experience, including management and complexity. of construction plan and specification Ed Wicklein,PE CFD Modeling development for a variety of water and wastewater civil .e Ed has 21 years of experience focused on engineering projects. design and analysis of municipal hydraulic and Kevin Heeney,PLS Surveying treatment facilities using CFD modeling. He • Kevin is a Principal Surveyor with CTA has experience in all phases of modeling,including code 10.L Engineering and Surveying. For 43 years, he :.:, ;1=! development,flow analysis, and data visualization.Ed has been involved with surveying and mapping has completed more than 100 CFD projects, which have projects throughout California, drawing on his knowledge included CFD analysis of flow splitting structures and of technologies and his project management skills to secondary sedimentation processes. ensure the successful completion of projects. Mike Dadik,PE,SE I Structural and Coatings Darby Howard,PE I Condition Assessment Mike is Carollo's structural practice leader '► Darby has 35 years of experience specializing for Northern California.With more than 28 in corrosion failure analysis, material selection t years of experience, Mike specializes in water for corrosive environments, cathodic protection and wastewater treatment and infrastructure design, design and engineering maintenance, and stray current seismic rehabilitation and retrofit, and coating and analysis for water and wastewater pump stations, treatment corrosion control. Mike has performed structural design plants, and pipelines. Darby worked with Carollo on of more than$300 million in wastewater expansion and STPUD's Big 5 Pump Station Condition Assessment. rehabilitation projects. Team Member Qualifications and Experience Team Member Relevant Project Experience Mike Britten,PE • Program manager for the City of San Jose,CA,Nitrification Clarifier Rehabilitation project. Project Manager • Project manager for design of the City of Turlock,CA,Secondary Clarifier No.4. Reno Office • Project manager for design of the City of San Francisco,CA,Clarifiers 3 and 4. BS Civil Engineering • Project manager for the Sewer Authority Mid-Coastside,CA,Wastewater Treatment Plant Expansion,which included 45 Years of Experience two new circular secondary clarifiers. • Project manager for the Veolia Water,CA,Richmond Wastewater Treatment Plant Secondary Clarifier Improvements. Scott Parker,PE, • Principal-in-charge/project manager for the South Tahoe Public Utility District,CA,Headworks Replacement and BCEE Twin Peaks Booster Station and Water Line Replacement. Principal-in-Charge/ • Principal-in-charge/project manager for the Fairfield-Suisun Sewer District,CA,$22 million Secondary Treatment Technical Advisor Expansion,which included conversion of an intermediate clarifier and new secondary clarifiers. Sacramento Office • Principal-in-charge for the City of Chico,CA,$45 million Water Pollution Control Plant Expansion to 12 mgd.New MS Environmental,BS Civil facilities include headworks,aeration tanks,aeration blowers,secondary clarifier,etc. Engineering • Project manager/engineer for the City of Chico,CA,$33 million 9-mgd nitrification improvements,which involved 29 Years of Experience headworks,primary clarifiers,anaerobic digesters,secondary clarifiers,and aeration blowers. TECHNICAL PROPOSAL B:A Pursuits\Client84(SAC)\STPUD\SecClarifierRehab\Prop0719\Indd\O1-TechProposal.indd Team Member Qualifications and Experience Team Member Relevant Project Experience Ricky Gutierrez,PE • Project engineer for the South Tahoe Public Utility District,CA,Process and Hydraulic Analysis,which involved an Project Engineer evaluation of the Wastewater Treatment Plant that focused on the activated sludge unit process. Reno Office • Design engineer and resident engineer during construction of the City of Chico,CA,Water Pollution Control Plant 12-mgd Expansion,which included a new headworks facility,aeration tanks,secondary clarifier,digester,etc. MS Civil and Environmental, Project manager for the Fairfield-Suisun Sewer District,CA,Blower Replacement,which enhanced the reliability and BS Civil Engineering efficiency of the secondary treatment process aeration system. 15 Years of Experience . Project engineer for the Sacramento Regional County Sanitation District,CA,EchoWater Project$32 million Return Activated Sludge Pumping Project,which includes 48 pumps located at 24 secondary sedimentation tanks. Ed Wicklein,PE • Project engineer for the South Tahoe Public Utility District,CA,Headworks Replacement.Used CFD modeling to CFD Modeling optimize flow split and velocity distribution in the channels leading to primary clarifiers. Seattle Office • Project engineer for the West County Sewer District,CA,Secondary Clarifier Improvements.Used a custom solids transport model to evaluate inlet baffle improvements to increase the sedimentation capacity. MS/BS Civil Engineering, • Project engineer for CFD modeling for the Vallejo Sanitation and Flood Control District,CA,Secondary Clarifiers.Used Hydraulics the CFD model to evaluate performance for a range of commercially available products. 21 Years of Experience Mike Dadik,PE,SE Structural engineer for the South Tahoe Public Utility District,CA,Sludge Handling/Odor Control Facilities and Structural and Headworks Replacement projects. Coatings Structural engineer for preliminary and final design of the City of Turlock,CA,Headworks and Secondary Treatment Walnut Creek Office Capacity Expansion Phase 1. BS Civil Engineering • Structural engineer for the Union Sanitary District,CA,Primary Clarifier Rehabilitationpreliminary/final design. 28 Years of Experience • Structural engineer for the Fairfield-Suisun Sewer District,CA,$22 million Secondary Treatment Expansion,which included intermediate clarifier,secondary clarifiers,influent pump station,and aeration basin retrofits. Daniel Robinson,PE • Electrical/instrumentation and controls manager for the City of Hughson,CA,Wastewater Treatment Plant Electrical/I&C Expansion,which included main lift station,headworks,oxidation ditch,and secondary clarifier. Sacramento Office • Electrical/instrumentation and controls manager for the City of Reno,NV,Water Reclamation Facility Expansion, which included headworks,oxidation ditch,aeration basin,secondary clarifier,chlorine contact basin,etc. BS Mechanical Engineering • Instrumentation and controls engineer for the Sacramento Regional County Sanitation District,CA,EchoWater Technology Project$32 million Return Activated Sludge Pumping Project. 20 Years of Experience Eric McGrath,PE • Project manager for the Washoe County,NV,Collection System Flow Monitoring and Hydraulic Modeling. Project Engineer • Project manager for the County of Washoe,NV,Pleasant Valley Interceptor 3 Predesign. Reno Office(775-332-8732) • Project manager for the City of Millbrae,CA,Madrone Pump Station Rehabilitation and Preliminary Design. BS Civil Engineering • Project engineer for the Contra Costa Water District,CA,Treated Water Renewal and Replacement Study Update Asset 32 Years of Experience Management Plan. Kevin Heeney,PLS • Sacramento Regional County Sanitation District,CA,EchoWater Projects. Surveying • California Department of Corrections and Rehabilitation Deuel Vocational Institution Wastewater Treatment Plant Engineering,Industry,and Modifications mapping and Due Diligence documents. Technology • City of Sacramento,CA,Sacramento River/E.A.Fairbairn Water Treatment Plants Rehabilitation topographic mapping. 43 Years of Experience • California Department of Corrections and Rehabilitation California Men's Colony Wastewater Treatment Plant UV Disinfection Design. J.Darby Howard,PE • Corrosion assessment specialist for the South Tahoe Public Utility District,CA,Big 5 Pump Station Condition Condition Assessment Assessment,which involved on-site corrosion evaluation of wet wel Is to assess extent of deterioration. BS Civil/Structural • Delta Diablo,CA,Headworks Concrete Condition Assessment,which involved an inspection of the wastewater Engineering treatment plant screen channel,manhole influent pipe,and grit chamber pump room. 35 Years of Experience • Sacramento Regional County Sanitation District,CA,Arden Pump Station wet well condition assessment,including influent channels,sluice gates,hand rails,concrete walls,manholes,and various appurtenances. • City of San Mateo,CA,Wastewater Treatment Plant,which included a condition assessment of reinforced concrete exposed to wastewater in the influent junction box and recommendations for remedial repair based on findings. TECHNICAL PROPOSAL B Pursuit,Clicnt84(S.AC)\STPUll SccChuthcrRchab 1'r p0719\InddV01 TcdiProposal.indd 4. Manhour Estimate ESTIMATED LEVEL OF EFFORT S.Parker M.Britten R.Gutierrez E.McGrath C.Taylor M.Dadik D.Robinson E.Wicklein Principal- Project Senior Task in-Charge Project Project Engineer Staff Structural El&C CFD CAD Graphics/CAD Clerical Total QA/QC Manager Engineer pre Purchase Professional Engineer Engineer Modeling Technician Technician Support AND REVIEW WIMP" WilliWrillirill 1.1 Kickoff Meeting 6 6 8 0 4 0 0 0 0 0 4 28 1.2 Review Operating Data,Reports,and Existing Conditions 1 4 8 0 8 4 0 0 0 0 0 25 Task 1 Hours 7 10 16 0 12 4 0 0 0 0 4 53 TASK 2—DESIGN AIMIL . 2.1 Site Investigations and Survey 1 1 10 0 16 0 0 0 0 4 4 36 2.2 Conduct Condition Assessment 0 4 8 0 8 0 0 0 0 0 0 20 2.3 Conduct Seismic Analysis and Groundwater Uplift Analysis 2 4 8 0 0 24 0 0 4 0 0 42 2.4 Alternatives Development and Evaluation 2 4 16 4 24 6 4 0 0 0 8 68 2.5 Alternatives Evaluation Workshop 4 12 12 0 12 0 0 0 0 0 0 40 2.6 Prepare Design Memorandum 2 4 16 0 16 4 4 0 0 4 8 58 2.7 Basis of Design Workshop 0 6 6 0 12 0 0 0 0 0 0 24 2.8 Prepare 90%Design and Cost Estimate 12 26 42 0 123 29 64 0 53 132 29 509 2.9 90%Design Workshop 0 6 6 0 12 0 0 0 0 0 0 24 Task 2 Hours 23 67 124 4 223 63 72 0 57 140 49 821 TASK 3—CONSTRUCTION DOCUMENT' 3.1 Prepare 100%Design Documents and Cost Estimate 6 11 18 0 53 12 27 0 26 53 14 220 Task 3 Hours 6 11 18 0 53 12 27 0 26 53 14 220 TASK 4—BIDDING SERVICES 4.1 Attend Pre-Bid Conference 0 2 4 0 8 0 0 0 0 0 0 14 4.2 Prepare Addenda 1 2 16 0 16 2 2 0 4 0 4 14 Task 4 Hours 1 4 20 0 24 2 2 0 4 0 4 28 TASK 5—PROJECT MANAGEMENT molIM 5.1 Resource Management and Monthly Reporting 2 16 8 0 0 0 0 0 0 0 0 26 Task 5 Hours 2 16 8 0 0 0 0 0 0 0 0 26 TASKS 1-5 TOTAL HOURS 39 108 186 4 312 0 87 192 71 1,148 OPTIONAL SERVICES TASK 6—PREPARE PRE-PURCHASE DOCUMENTS Task 6 Hours 2 12 20 40 40 4 4 0 8 12 16 158 TASK 7—CFD MODELING Task 7 Hours 2 4 16 0 0 0 0 46 0 0 0 68 OPTIONAL SERVICES TOTAL HOURS 4 16 36 40 40 46 8 12 16 226 TECHNICAL PROPOSAL 14 B:\Pursuits\Client84(SAC)\STPUD\SecClarifierRehab\Prop0719\Indd\02-ManhourEst.indd 5. Information/Document Needs The only information we anticipate needing from the District is data on historical groundwater levels, which will be used to assess the effects of groundwater uplift pressures on the clarifier floor slab and determine if groundwater dewatering would be required to construct the new center column foundation. TECHNICAL PROPOSAL B:\Pursuits\Client84(SAC)\STPUD\SecClarifierRehab\Prop0719\Indd\03-InfoDocNeeds.indd APPENDIX A Sample Work Product 7 x, wX` . -- _. ... _ .. • - - " ANDw y -daft. `ti-ter t a x: sue . � ..,.. I''"` - , �-- �=� _ PROJECT MEMORANDUM CITY OF RICHMOND WWTP Date: 10/10/2017 CRITICAL IMPROVEMENTS Project No.: 1o34oA.10 PROJECT City of Richmond Prepared By: E.Wicklein Reviewed By: J. McCormick,A. Conklin, K. Rogers, D.Jenkins Subject: Feasibility of Increasing Secondary Clarifier Capacity Objective The objective of this project memorandum is to summarize the feasibility of implementing a new clarifier mechanism in each of the existing secondary clarifiers and to assess impact on capacity. Conclusion Computational fluid dynamics(CFD)modeling was performed to assess the impact of the new mechanism on the plant capacity. Replacing the existing clarifier mechanisms with new mechanisms is not anticipated to increase the treatment capacity of the clarifiers. Recommendations It is recommended the City: • Replace the existing clarifier mechanisms with new clarifier mechanisms in order to replace aging infrastructure that has reached the end of its useful life and is essential to providing wastewater treatment.The mechanisms also need to be replaced because their current condition poses a safety hazard.These improvements should be implemented in the immediate term, as part of the WWTP Critical Improvements Project. • Should increased clarifier capacity be required in the future, it is recommended the City increase the firm return activated sludge(RAS)pumping capacity from 6.o mgd to 13.o mgd. • Should nutrient removal (e.g., nitrification and denitrification)be required in the future, it is recommended the City implement additional aeration basins and/or secondary clarifiers. Summary As identified in the 2010 WWTP Master Plan and 2016 WWTP Facility Plan, upgrades to the secondary clarifiers are required to improve the performance of the secondary treatment process to more reliably removal total suspended solids(TSS).The secondary clarifiers have some performance related issues and the secondary clarifier mechanisms have reached the end of their useful life. Secondary clarifier improvements were designed as part of the WWTP Critical Improvements Project to replace the aging mechanisms and address performance issues where feasible.As part of the design effort, an evaluation was completed to determine if additional modifications could be made to increase the treatment capacity of the clarifiers.The evaluation included three dimensional computational fluid dynamics(CFD) modeling. pwA\Carol to/Documents\Client/CA/Veol is/10340A10/Del ivera tiles/PM01\PM_Feasi ibi IityOfl ncreasi ngsecondaryCla nfierCapacity Based on the evaluation,the overall structural shape of the clarifiers is the most significant factor limiting their capacity. Secondary Clarifiers No.i and 2(SC-1 and SC-2)are square in shape, have a relatively shallow depth, and flat floor. Secondary Clarifier No.3(SC-3)-although round - is also relatively shallow and has a moderately sloped floor.As a result,although modifications can be made to the existing clarifiers to optimize their performance and increase their reliability,these modifications are not anticipated to increase their solids loading capacity or significantly improve their performance.The modifications will largely replace aging infrastructure that is essential to treatment operations. Replacing the mechanisms will also improve plant safety because their current condition poses a safety hazard. To maximize the use of existing assets and minimize costs, it is recommended the City implement the following improvements to replace aging infrastructure and optimize the performance of the secondary clarifiers(where feasible)to more reliably remove TSS: 1. Maintain even flow split between the clarifiers by setting the existing gates at predetermined positions. 2. Install a coarse air mixing system in the mixed liquor channel to ensure solids are well mixed and evenly split between the clarifiers. 3. Improve inlet conditions in the modified clarifier a. Replace the elevated inlet channel with a mid-depth suspended influent pipe that turns upward at the center of the tank and enters a conventional energy dissipating inlet(EDI)feed well. b. Add Stamford baffles to SC-3. 4. Replace the existing suction header type mechanism with a new suction header type mechanism. 5. Simplify and improve the suction header design: a. Fill in the deep center well with concrete so the floor is more level throughout the clarifier. b. Fill in the corners of the"squircles"with concrete to guide the sludge toward the circular removal header. With the implementation of these improvements,the secondary treatment capacity is estimated to be 20 million gallons per day(mgd)at a mixed liquor suspended solids(MLSS)concentration of no more than 1,800 milligrams per liter(mg/L)and a sludge volume index(SVI)of 15o mL/g.This equates to an average and peak solids loading rate(SLR)of 4and 13 ppd/sf in the year 2027, respectively.This is sufficient treatment capacity to treat the projected near-term flows and loads for biochemical oxygen demand(BOD) and TSS removal without nitrification, and may be sufficient to treat projected flows and loads through 2027 assuming no changes in permit conditions. However, depending on the actual operating conditions of the secondary treatment process, influent flow and loads, and clarifier performance, additional improvements may be required to increase the secondary clarifier capacity prior to 2027. To increase the capacity of the secondary clarifiers,the firm RAS pumping capacity could be increased from 6.5 mgd to 13 mgd.With this improvement,the secondary treatment capacity is estimated to be 20 mgd at an MLSS concentration of no more than 2,20o mg/L and an SVI of 15o mL/g.This is anticipated to provide sufficient capacity to treat buildout flows and loads for BOD and TSS removal assuming no changes in permit conditions. However, during maximum month flows and loads, additional aeration basin volume may be required. It is anticipated the standby aeration capacity provided by Zones B and C of Aeration Basin No. 2 could be used during the maximum month conditions. (Note,this standby aeration capacity is to be implemented with the WWTP Critical Improvements Project.) It is anticipated additional aeration basins and/or secondary clarifiers would be required to provide nutrient removal(e.g., nitrification and denitrification).After the secondary clarifier improvements included in the WWTP Critical Improvements Project are implemented, it is recommended the City assess the actual performance of the secondary clarifiers.The Facility Plan and associated capital improvement program(CIP) could then be updated based on the secondary clarifier performance and any updates to the anticipated nutrient removal regulations. This memorandum summarizes the secondary clarifier performance issues,the CFD modeling approach,the CFD modeling results, and the recommended improvements. Secondary Clarifier Performances Issues As identified in the 2010 WWTP Master Plan and 2o16 WWTP Facility Plan,the secondary clarifiers have the following performance issues: • In the square clarifiers(SC-i and SC-2), sludge accumulates in the corners and turns septic.As a result,the sludge rises to the surface and goes over the effluent weirs,which contributes to poor performance and increases the potential for TSS violations.The Master Plan recommended filling in the corners of the clarifiers with concrete to make them more circular.This will allow the sludge to settle towards the center of the clarifiers, instead of accumulating in the corners. • The draft tubes in all three clarifiers clog frequently, causing the sludge blankets to rise in portions of the clarifiers that are serviced by the clogged draft tubes.The draft tubes clog because a large amount of debris passes through the coarse bar screen.The Master Plan recommended replacing the clarifier mechanism with a blade type collector that moves the sludge to the center of the clarifier for removal. • When operated at high flows, Clarifier No.3 has solids carryover into the effluent. Possible reasons for this include clogged draft tubes and short-circuiting due to high weir overflow rates.The Master Plan recommended installing density current baffles to the clarifier and replacing the feed well with an energy dissipater/flocculating feed well. CFD Modeling Approach CFD modeling of the secondary clarifier performance was conducted to determine recommended improvements to address these issues. More specifically, it was conducted to determine the optimal mechanism design and to identify other modifications to the secondary clarifiers that could cost effectively improve performance and maximize capacity. Flows and Loads Table 1 summarizes the current and projected secondary influent flows and loads and operating conditions used for this analysis.The flows and loads were taken from the 2o16 Facility Plan.The operating conditions are based on the design criteria for the WWTP Critical Improvements Project. Table i Current and Projected Future Operating Conditions Design Criteria Current(2015) Projected 2027 Projected 2040 Treatment Type BOD/TSS removal BOD/TSS removal BOD/TSS removal Average Dry Weather Secondary Effluent Flow, mgd(1) 5.8 6.5 7.4 RAS, mgd 3.7 4.2 4.7 Total Flow to Secondary Clarifiers, mgd 9.5 10.7 12.1 MLSS, mg/L 1,000 i,800 2,000 SVI, mL/g 150 3.5o 150 Max Month Secondary Effluent Flow, mgd(1) 13.5 15.2(3) �7.3(3)(5) RAS, mgd 6.5 6.5(3) 6.5 (3) Total Flow to Secondary Clarifiers, mgd 20 21.7 23.8 MLSS, mg/L 1,700 i,800 2,200 SVI, mL/g 150 150 150 Peak Wet Weather Secondary Effluent Flow, mgd 20 20(3) 20(4) RAS, mgd 6.5 6.5(3) 3.3.0(4) Notes: (i) Per 2016 WWTP Facility Plan. (2) RAS Pumping Capacity=6.5 mgd(Firm);23 mgd(Total). (3) Improvements to increase firm RAS pumping capacity from 6.5 mgd to 23.o mgd may be required. (4) Improvements to increase firm RAS pumping capacity from 6.5 mgd to 23.o mgd would be required. (5) Secondary treatment capacity may be limited by the solids loading rate(SLR)on the secondary clarifiers.Additional aeration basin volume may be required to treat maximum month flows and thereby reduce the MLSS concentration to reduce the SLR on the secondary clarifiers. CFD Model Configuration A model was developed of one of the"squircle"clarifiers(SC-i, SC-2)to evaluate the secondary clarifier performance.The SCs 1 and 2 have a slightly less optimum configuration than SC-3 and are therefore assumed to conservatively estimate the performance of SC-3. Furthermore,the recommended improvements to SCs 1 and 2 will make them more similar to SC-3. SCs land 2 are"squircle"type clarifiers i.e.square with rounded corners.They have an elevated influent channel, inward flowing feed well,and an inboard launder.The bottom is nearly flat in most of the clarifier, with a deeper recessed section in the middle. SC-3 is a circular clarifier,with an elevated influent channel, inward flowing feed well, and an overflow weir located on the outside wall of the clarifier.The bottom is sloped in most of the clarifier,with a deeper recessed section in the middle. The model computational mesh size varied from o.24 inches to approximately 4-inches with approximately 1.4 to 1.7 million computational elements.The model used a custom solids transport model based on sludge volume index(SVI)to evaluate sedimentation. Details such as an energy dissipating inlet(EDI)were not evaluated at this time, however it is assumed that an EDI would be included from the equipment supplier that promoted uniform inflow conditions. It is assumed that once the secondary clarifier improvements are implemented,the three secondary clarifiers will have similar treatment performance and capacity.As a result,the simulations assumed the total system flow was divided evenly between the three clarifiers. CFD Modeling Results Mechanism Type and Concrete Fillets The overall structural shape of the clarifiers is the most significant factor limiting their capacity.They are relatively shallow and flat compared to modern secondary clarifiers.As a result,although modifications can be made to the existing clarifiers to optimize their performance and increase their reliability,the CFD modeling results indicate these modifications are not anticipated to increase the capacity of the secondary clarifiers or significantly improve their performance. The model was initially setup with a scraper mechanism moving sludge to the center deeper drawoff well, and outward flowing feedwell.The performance was simulated at the maximum projected flow and load condition - 204o maximum month flow of 17.3 mgd, a firm RAS capacity of 6.5 mgd, MLSS inflow of 3500 mg/I, and SVI of i5o mL/g.The model results(which are shown in Figure i of Appendix A), show the clarifiers appears overloaded and at or near failure. Based on the CFD modeling results, industry experience, and manufacturer recommendations it was determined a suction type mechanism would be the most appropriate technology for this application. In flat bottom clarifiers, suction-type mechanisms typically result in lower sludge blankets as compared to scraper- type mechanisms and generally perform better'.Although draft tubes on suction headers can clog,the benefit of increased sludge removal outweighs this drawback.The modern suction header technology recommend is expected to be less prone to clogging than the existing suction header because the modern header has larger diameter draft tubes. However, it should be noted,the most effective way to reduce clogging issues would be to implement a new screening and grit removal facility at the WWTP. Several modifications to optimize basin performance were identified and modeled.These improvements include: • To achieve more even sludge withdrawal, implement a suction header. • To simplify the suction header design: - Fill in the deep center well with concrete so the floor is more level throughout the clarifier. - Fill in the corners of the"squircles"with concrete to guide the sludge toward the circular removal header • To improve the distribution of the influent flow within the clarifiers: - Replace the elevated inlet channel with a mid-depth suspended influent pipe that turns upward at the center of the tank and enters a conventional EDI feed well. - In Clarifier 3, add an EDI feed well to dissipate the energy of the influent flow and Stamford baffle to help control return density current.(Note,this baffle was not modeled but based on previous installations is anticipated to improve sedimentation.) The model was re-run to determine the maximum MLSS concentration that could be sustained at peak flow with the recommended improvements. Peak flow to the clarifiers was determined to be 26.5 mgd,which is comprised of the estimated peak day secondary process flow of 20 mgd and the firm RAS pumping capacity of 6.5 mgd.At this flow condition and an SVI of 15o ml/g,the estimated maximum MLSS is 1,800 mg/L. Figure 2 in Appendix A shows the clarifier performance at these conditions. 'Per Ekama,G.A., Barnard,J.,Gunthert, F., Krebs, P., McCorquodale,J.A., Parker, D.S.,and Wahlberg, E.J.(1997). Secondary Settling Tanks:Theory, Modelling,Design and Operation. Published by the International Association on Water Quality, STR No.6,1997, Richmond, UK. This is sufficient treatment capacity to treat the projected near-term(2018—2023±)flows and loads for BOD and TSS removal, and may be sufficient to treat projected flows and loads through 2027. However, depending on the actual operating conditions of the secondary treatment process(e.g., SVI and SRT), influent flow and loads, and clarifier performance, additional improvements may be required to increase the secondary clarifier capacity prior to 2027. If the secondary clarifier capacity begins to be exceeded the City could implement the following operational changes to increase capacity: • Reduce the SVI. It is important to note, all analysis was based on an SVI of 15o mL/g.All options to reduce SVI to this level or lower should be explored first and foremost, as SVI will have a significant impact on the capacity. Options to reduce SVI include: - Add chlorine to the RAS line - Add polymer to the mixed liquor channel or aeration basins - Increase the anaerobic volume of the aeration basins • Use the standby aeration capacity provided by Zones B and C of Aeration Basin No. 2 for treatment. (Note,this standby aeration capacity is to be implemented with the WWTP Critical Improvements Project.) RAS Pumping Improvements To increase the capacity of the secondary clarifiers,the firm RAS pumping capacity could be increased from 6.5 mgd to 13 mgd.With this improvement,the secondary treatment capacity is estimated to be 20 mgd at an MLSS concentration of no more than 2,20o mg/L and an SVI of 15o mL/g.This is capacity is limited by the SLR on the secondary clarifiers. (Note,the total flow to the clarifiers would be 33 mgd = 20 mgd secondary process flow+13 mgd RAS flow.)Figure 3 in Appendix A shows the clarifier performance at these conditions. This is planned to provide sufficient capacity to treat buildout flows and loads for BOD and TSS removal in dry weather. However, during maximum month flows and loads, additional aeration basin volume may be required to reduce the MLSS concentration and resulting SLR on the secondary clarifiers. It is anticipated the standby aeration capacity provided by Zones B and C of Aeration Basin No. 2 could be used during the maximum month conditions.(Note,this standby aeration capacity is to be implemented with the WWTP Critical Improvements Project.) Nutrient Removal Improvements The 2016 Facility Plan assumed the secondary treatment facilities could be optimized and expanded to provide nutrient removal (e.g. nitrification and denitrification)in the future to meet anticipated discharge regulations. It was assumed additional aeration basins would be required, but that the existing secondary clarifiers would have sufficient capacity. Operating at an aerobic SRT(aSRT)of around 7 days will likely be required in the future to provide nutrient removal. Based on process modeling results, operating at these elevated aSRTs will likely increase the MLSS concentration to around 300o to 350o mg/L. Based on the findings of the WWTP Critical Improvements design and this CFD modeling effort, it is anticipated both additional aeration basins and secondary clarifiers will be required to allow for operation at these higher aSRTs to provide nutrient removal. Figure 7 in Appendix A shows the secondary clarifier approaches failure when the MLSS concentration is increased to 3,50o mg/L. After the secondary clarifier improvements included in the WWTP Critical Improvements Project are implemented, it is recommended the City assess the actual performance of the secondary clarifiers.The Facility Plan and associated capital improvement program(CIP)could then be updated based on the secondary clarifier performance and any updates to the anticipated nutrient removal regulations.This effort should then be repeated once the aeration upgrades included in the WWTP Critical Improvements Project are implemented. Prepared by: Ed Wicklein EW:dlt Appendix A CFD Modeling Results Initial Layout with Scraper 2040 MMF,17.3 mgd out,5.5 mgd RAS , 3500 mgA,S1/I=150 Perfect Inlet Conditions ML SS[mgA] : 802000 7 ❑ 640❑ 56❑0 4800 400❑ 320❑ 2400 1600 411111441114444111%16.--` 800 Figure i. Secondary Clarifier i(or 2)with a Scraper-Type Mechanism,at 204o Maximum Month Flow Conditions and MLSS=3,50o mg/L Figure a shows the clarifier is at or near failure. Based on this, it was determined a scraper type mechanism would not provide sufficient sludge removal. A-1 pm\\Carol to/Documents\Client/CA/Veol is/10340A10/Del ivera tiles/PM01\PM_Feasi ibi IityOfl ncreasi ng5econdaryCla rifierCapacity Filled Center,Corner Fillet Filled Center,Corner Fillet 2027 MMF,20 mgd out,6.5 mgd RAS 2027 MMF,15.2 mgd out,13 mgd RAS 1800 mg/I,SVI=150 2000 mg/I,SVI=150 Per fwt Inlet Conditions Perfect Inlet Conditions r I � MLSS[mgA) 1 sasoaoon • w a000 T � 3500 1111111 I r- ' apjf .. af 3000 200 2000 1500 1000 11111111X., o.c:/::-. Ail 500 Filled Center,Corner Fillet Filled Center,Corner Fillet 2027 MMF,20 mgd out,6.5 mgd RAS 2027 MMF,15.2 mgd out,13 mgd RAS 1800 mg/I,SVI=150 2800 mg/I,SVI=150 Perfect Inlet Conditions Perfect inlet Conditions Relative 9evation[Ri Relative Pev®tian[ft] at 50 mgA level at 50 mgil level ; ii 10.0 8.5 9.0 8.5 8.0 7,5_ __. 7.0 `� 6.5 jilp Ill ' , 4 6.0 5.5 5.0 • Figure 2.Secondary Clarifier i(or 2)with a Suction-Type Mechanism and Concrete Fillets,at 2027 Peak Flow and Maximum Month Flow Conditions Figure 2 shows the clarifier performance is much better with a suction-type header and concrete fillets in the center and corners. It shows at a peak secondary process flow of zo mgd and a RAS flow of 6.5 mgd,the MLSS concentration could be as high as 1,800 mg/L. A-2 pwA\Ca rot to/Documents\Client/CA/Veol is/10340A10/Del ivera tiles/PM01\PM_Feasi ibi IityOfl ncreasi ng5econdaryCla rifierCapacity Filled Center,Corner Fillet Filled Center,Corner Fillet 2027 MMF,20 mgd cut,13 mgd RAS 2027 MMF,15.2 mgd out,13 mgd RAS 2200 mgll,SVI=150 2000 mg/I,SVI=150 Per rr,.,t Inlet Conditions Perfect Inlet Conditions -- ---- asoa /_ =r, A � / ''' ML8Sa233ao5mo0o0D / � 1500 ailliggliggillr) 1000 500 r '1 Pi: ......,..,...di I I , ip_______1.1111111F1 giiiiiriii. Sr s• • c Filled Center,Corner Fillet Filled Center,Corner Fillet 2027 MMF,20 mgd cut,13 mgd RAS 2027 MMF,15.2 mgd out,13 mgd RAS 2200 mg/I,SVI=150 2800 mg/I,SVI=150 Parted,Inlet Conditions Perfect Inlet Conditions Relative eevation[Ri Relative eevation lfg at 50 mgA level at 50 mgA level 10.0 �•~ 10.0 �� 9•S 9.5 �_ 0.0 9.0 8.8 8.5 � . 8.0 8.0 :� FL 7.0 6.s 6.0 ll.0_,`., 5.0 >� • �� Figure 3.Secondary Clarifier a(or 2)with a Suction-Type Mechanism, Concrete Fillets,and Increased RAS Pumping at 2027 Peak Flow and Maximum Month Flow Conditions Figure 3 shows at a peak secondary process flow of 20 mgd and a RAS flow of 13 mgd,the MLSS concentration could be as high as 2,20o mg/L. A-3 pwA\Ca rot to/Documents\Client/CA/Veol is/10340A10/Del ivera tiles/PM01\PM_Feasi ibi IityOfl ncreasi ng5econdaryCla rifierCapacity Filled Center,Corner Fillet Filled Center,Corner Fillet 2027 MMF,15,2 mgd out,5.5 mgd RAS 2027 MMF,15.2 mgd out,6.5 mgd RAS 2800 mg/I,SVI=150 2800 mg/I,SVI=150 itk Perfect_Inlet Conditions _ Perfect Inlet Conditions -. - ......- ---:-..'A.,.. ...--,A%-,,..- . 4'44,..,7..,..,. \ 141t.:Iii,. Turbulent Conditions - in the Corner _ - a:+ __jam: _ _ _ x , y ref /i v. � t ' ' �� MLSS Vogls) Velocity WS.) \...v'`� !� 0.10 ,, °',' • +• - - downward current 1800 v.as i -= p1 Ian the comer fillet 1600 0.08 �r _._ lava 007 .�+p f 1200 o.ofi - ' '' \. 1000 0.05 s . SOv 0.04 'ice" ,;� -- - S00 O;o3 400 DM - 200 a.ai - a 0,00 ~( Figure 4.Secondary Clarifier 1(or 2)with a Suction-Type Mechanism and Concrete Fillets,at 2o27 Maximum Month Flow Conditions and MLSS=2,80o mg/L Figure 4 shows implementing a suction-type mechanism and concrete fillets at the bottom and corners of SC-i and SC-2 will provide improved sludge removal, compared to just adding a scraper-type mechanism. The image on the right shows the corner fillets appear to keep the sludge out of the corners in the area that is swept by the sludge withdrawal mechanism.The image on the left shows there is turbulence in the corner area. Flow traveling along the walls appears to reflect back into the tank at the corner where it meets inflow traveling outward. A-4 pwA\Carol to/Documents\Client/CA/Veol is/10340A10/Del ivera tiles/PM01\PM_Feasi ibi IityOfl ncreasi ng5econdaryCla nfierCapacity Filled Center,Corner Fillet Filled Center,Corner Fillet 2027 MMF,15.2 mgd out,6.5 mgd RAS 2027 MMF,15.2 mgd out,6.5 mgd RAS 2800 mg/I,SVI=150 2800 mg/I,SVI=150 Perfect Inlet Conditions,Comer Stamford Perfect Inlet Conditions J. Relative Elevation{ft) Relative Elevation{R} at 50 no level at 50 rn l level 9.5jtt �_. 9.0 9.0 _ .5 8.5 8.0Ai IMP 7 .� 8.0 .5 `~a 7.5a 7.0 7.0 - - 0.5 4 . 1 5.0 6.0 .0 • 5.5 _ - 5.5 5.0 .. . IS • 110 i . # ' - •-.- _— ---. ' : • Figure 5.Sludge Blanket Depth with and without Corner Baffling Secondary Clarifier i(or 2)with a Suction-Type Mechanism and Concrete Fillets,at 2027 Maximum Month Flow Conditions and MLSS=2,80o mg/L A baffle was tested at the inside corners of the effluent weir to reduce the turbulence.As shown in Figure 5, overall the baffle has a limited effect on sludge blanket height. Given the difficulty and cost of constructing a baffle, it was dropped from further consideration. A-5 pwMCarollo/Documents\Client/CA/Veolia/10340A10/Deliverables/PM01\PM_FeasiibilityOflncreasing5econdaryClarifierCapacity Filled Center,Corner Fillet Filled Center,Corner Fillet 2027 MMF,15.2 mgd out,13 mgd RAS 2027 MMF,15.2 mgd out,6.5 mgd RAS 2800 mg/I,SVI=150 2800 mg/I,SVI=150 Perfect Inlet Conditions Perfect Inlet Conditions i Relative Elevation{ft) Relative Elevation(5) at 50 mgd level at 50 mgA level 10. 10.0 9.05 9.5 S.0 9.0 jfl jfl 5.5 5.5 1 5.0 ] 5.0 100 • Figure 6.Sludge Blanket Depth with and without Increased RAS Pumping Secondary Clarifier i(or 2)with a Suction-Type Mechanism and Concrete Fillets,at 2027 Maximum Month Flow Conditions and MLSS=2,800 mg/L Figure 6 shows doubling the RAS pumping rate from 6.5 mgd to 13.o mgd significantly lowers the sludge blanket depth, and thereby improves secondary clarifier performance. Filled Center,Comer Fillet Filled Center,Corner Fillet 2027 MMF,15.2 mgd out,6.5 mgd RAS 2027 MMF,15.2 mgd out,6,5 mgd RAS 3500 m911 SVI=150 2800 mall,SVI=150 PDriectTnlet Conditions Purled inlet Conditions Relative©evation ITO Relative Elevation(ft! at 50 mgA level at 50 mjt level IC° 9.5 i'L ii lio — AP1001,711•S A-6 pwA\Ca rot to/Documents\Client/CA/Veol is/10340A10/Del ivera bias/PM01\PM_Feasi ibi IityOfl ncreasi ng5econdaryCla rifierCapacity Filled Center,Corner Fillet Filled Center,Corner Fillet 202T MMF.15.2 mgd out.6.5 mgd RAS 2040 MMF,17.3 mgd out,6.5 mgd RAS 3500 melt SV I=150 3500 rrtdl,SVI 150 perfect nlet Conditions Perfect inlet Conditions • L. Relative Devation IRl Relative Elevation till at 50 mgA level at 50 mgil level 10.0 10.0 �� 9,5 � i s-5 9,p8.5 8-5 N 8-0 7-5 7-D 7.5 7.0 i 5.5 6-5 ,� • 5.5 5.5 5.0 �� 5-D E'• • -.A11111111e ' Figure 7.Sludge Blanket Depth with a Suction-Type Mechanism and Concrete Fillets, at Various Sludge Loading Rates(MLSS=2,800-3,50o mg/L),and at Current and Future Maximum Month Flows (15.2=17.3 mgd) Figure 7, shows the secondary clarifier approaches failure when the MLSS concentration is increased to 3,50o mg/L. Operating at a high MLSS concentration(e.g., 3,00o mg/L-3,50o mg/L)may be required in the future to provide nutrient removal, such as nitrification and denitrification.As a result, more clarifiers would likely be required to provide nutrient removal.Alternatively more aeration basins could be implemented to reduce the MLSS concentration required for nutrient removal. A-7 pvd:\\Ca rot to/Documents\Client/CA/Veol is/10340A10/Del ivera tiles/PM01\PM_Feasi ibi IityOfl ncreasi ng5econdaryCla rifierCapacity 1 2 3 4 I 5 I 6 I 7 I 8 I 9 I 10 I 11 12 13 2 a sA A ilielemi, WATERVEOLIA B CITY OF RICHMOND B VEOLIA WATER WEST OPERATING SERVICES c WWTP C RITIC A L I M P ROVEMENTS P ROJ E CT 1 ::::::-::::-::,,:::::::::::::::,:::::::::::::::,--::::::.:---:.---0.:•--:fi.:::".:::.:.:•-",f.:::::::•:::•-:::,::::ii.,--.,:•:,:::•:•••--ii:-::::•:-::•;::::::.:•...,.,.•,...,.,....:::::-..,:iiii..::::::ii,-i:i.,i,.....,.1.;11:::::ii...:!...,::.:1....tiiii:::............1.:i..1.::1:1....::1:.:1:.....„.„.„z.....„.. 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G w No.77655 y; 10340A.10 G / I DRAWING N01G01O. �� > OF CALIF Q N H m 1 OF 317 1 I 2 3 I 4 5 6 7 8 9 10 11 12 13 PROJECT NO.10340A.10 FILE NAME: 10340A1001G01.dgn 1 I 2 I 3 I 4 5 I 6 I 7 I 8 I 9 I 10 I 11 I 12 13 S GENERAL NOTES: z 1. SEE SECTION 01140 FOR SECONDARY CLARIFIER WORK SEQUENCE AND CONSTRAINTS. id 2. CUT EXISTING ANCHOR BOLTS FLUSH WITH EXISTING N CONCRETE SURFACE.BURN BACK ANCHORS 1"INTO EXISTING P4 CONCRETE.FILL HOLES WITH EPDXY PER SPECIFICATION z E, A A 13D09 SECTION 03071. A FoL i C 3. DEMOLISH ALL ACTIVE AND ABANDONED EXPOSED CONDUITS O 13D08 AND WIRES ASSOCIATED WITH THE SECONDARY CLARIFIERS, n 5 INCLUDING BUT NOT LIMITED TO:POWER TO DRIVES,POWER AND CONTROL TO THE LOCAL CONTROL PANEL,LIGHTING,AND d - '� THE MOTORIZED ROTATING SCUM SKIMMER.WIRES SHALL BE 0 I I N I I REMOVED FROM CLARIFIER MECHANISM SOURCE TO THEIR ':5;_ I I I ORIGIN,I.E.MCC,POWER PANELS OR PLC. - C 7 C•2 • I I P3 P2 P1 I I 13D09 13D09 13D09 '(XX _j / KEY NOTES:=O \k \ / I 1. DEMOLISH CLARIFIER MECHANISM EQUIPMENT INCLUDING B // / // • / \\\N I WALKWAY/BRIDGE,MIXED LIQUOR TROUGH LOCATED B / �;' / \ \\ // '' / \ I UNDER WALKWAY BRIDGE,CENTER PLATFORM,FEED WELL, \\ / INLET WELL,SLUDGE SCRAPER RAKE ARMS,CENTER CAGE, o // ' \ \ // \\� CENTER CONG,A D ALL TH SCAM S CI TED,SPRAYWATER PIPING,AND ALL OTHER ASSOCIATED ITEMS.VA � IIVA VA WALKWAY/BRIDGE WITH I MIXED LIQUOR TROUGH LOCATED UNDERNEATH EXIST ROTATING MOTORIZED SCUM �V V 1 SKIMMER(TYP) VA VA ��/ el;� �� 40��Mt N. o 1i/ I o�� I 0 i .( 1��49 - �' � �� i,!I� SkiUJ �1 Am, _-rr DJ / �� / i �� U I— Df I /if ��w� D EXIST SCUM /... �_ ��/ 2 BAFFLE AND EXIST STEEL LAUNDER/ I I ASSOCIATED // FIBERGLASS WEIR Oi SUPPORTS TO , li// PLATES AND I di REMAIN(TYP) I ASSOCIATED SUPPORTS I TO REMAIN(TYP) I m j SECONDARY CLARIFIER NO 1 O SECONDARY CI ARIFIFR NO 2 O I of a // I 1 o f �� I E � ImoV I / A I /�I I / I v / I vi C J I I — — — L-► D F F 0 11 T-0" 11 T-0" - g SECONDARY CLARIFIERS 1 AND 2 A SCALE:3/32"=1'-0" FILE:10340A1013S9101 m DESIGNED VERIFY SCALES JOB NO. fa, G RJN oQµ0FES5/O,ygl o.�. VEOLIA 10340A.10 G E DRAWN Fe�e�N E"40C Fyc ORIGINAAR IS L DE INCH RAWION DRAWING NO. m JDJ �� m (DO WWTP CRITICAL IMPROVEMENTS PROJECT O CHECKED w x No.77655.11 ��0„� VE O I A DEMOLITION 0®1" 13D06 id JAW sT ,. SECONDARY CLARIFIERS 1 AND 2 IF NOT ONE INCH ON SHEET NO. N DATE *9TF FIVpUFO�� WATER THIS SHEET,ADJUST g REV DATE BY DESCRIPTION OCTOBER 2017 ° DEMOLITION PLAN SCALES ACCORDINGLY 164 OF 317 1 I 2 I 3 I 4 I 5 6 I 7 I 8 I 9 I 10 I 11 12 1 13 PROJECT NO.10340A.10 FILE NAME: 10340A1013D06.dgn 1 I 2 I 3 I 4 I 5 I 6 I 7 I 8 I 9 I 10 I 11 I 12 I 13 S GENERAL NOTES: 1. SEE SECTION 01140 FOR SECONDARY CLARIFIER WORK a SEQUENCE AND CONSTRAINTS. 2. CUT ALL ANCHOR BOLTS FLUSH WITH CONCRETE AND COAT N PER 01732/3.02/H. o A zO 3. DEMOLISH ALL ACTIVE AND ABANDONED EXPOSED CONDUITS A F AND WIRES ASSOCIATED WITH THE SECONDARY CLARIFIERS, O x INCLUDING BUT NOT LIMITED TO:POWER TO DRIVES,POWER R AND CONTROL TO THE LOCAL CONTROL PANEL,LIGHTING,AND THE MOTORIZED ROTATING SCUM SKIMMER.WIRES SHALL BE REMOVED FROM CLARIFIER MECHANISM SOURCE TO THEIR "8 D ORIGIN,I.E.MCC,POWER PANELS OR PLC. a_ I 13D08 KEY NOTES:=O 1. DEMOLISH CLARIFIER MECHANISM EQUIPMENT INCLUDING WALKWAY/BRIDGE,MIXED LIQUOR TROUGH LOCATED I UNDER WALKWAY BRIDGE,CENTER PLATFORM,FEED WELL, I I rat INLET WELL,SLUDGE SCRAPER RAKE ARMS,CENTER CAGE, I EX 1"PA EX-3"CA ) CENTER COLUMN,ROTATING SCUM SKIMMER,SPRAY ( © WATER PIPING,AND ALL OTHER ASSOCIATED ITEMS. B ( EX-3"3W [ WALKWAY/BRIDGE WITH 2. PERIMETER HANDRAIL TO REMAIN. B O MIXED LIQUOR TROUGH LOCATED UNDERNEATH 3. CAP PIPE t0 VA /x VA / , � � �� \\ EXIST MOTORIZED \ ,, ROTATING SCUM //"•- \ / \\\\ ''' SKIMMER O / • C / V AA tt7.. it\ C /4 / 93.00,,Sp,‘N.1 \ \ I D iI 1 MN i ,_I/IAN/ 1 D z f �N� /�i N x \ ,_ ,;00 A k al f E / / o E \\ ,► / y, / 0 II D F F 8 g_ SECONDARY CLARIFIER 3 0 B SCALE:3/32"=1'-0" FILE:10340A1013S9101 m DESIGNED ,E"®„ JOB NO. rn G RJN oQµ0FES5/ONq� VEOLIA VERIFY SCALES 10340A.10 G NCH ON m DRAWN F��Q�N E ROCmA m , ® WWTP CRITICAL IMPROVEMENTS PROJECT ORIGINABAR IS L DIRAWING DRAWING NO. LS Y N0.77655 y � o o �° 13D07 CHECKED car0„� VE O L I A DEMOLITION rn JAW lit.:'''''' T ,. SECONDARY CLARIFIER 3 IF NOT ONE INCH ON SHEET NO. N DATE 9TF FICEL1 ? WATER THIS SHEET,ADJUST REV DATE BY DESCRIPTION OCTOBER 2017 ° DEMOLITION PLAN SCALES ACCORDINGLY 165 OF 317 1 I 2 I 3 I 4 I 5 6 I 7 I 8 I 9 I 10 I 11 I 12 1 13 PROJECT NO.10340A.10 FILE NAME: 10340A1013D07.dgn 1 i 2 I 3 I 4 I 5 I 6 I 7 I 8 I 9 I 10 I 11 1 12 I 13 KEY NOTES:=O a 1. DEMOLISH CENTER STRUCTURE AS REQUIRED TO COMPLETE MODIFICATIONS SHOWN ON STRUCTURAL v DRAWINGS. Oi s A A H 0 m EL 29.94 / / / CI a— / �EL 25.91 I ZEL 20.75 L_ / / 7 / B / r B m EL 12.39 (TOP OF GROUT) `v EL 12.39 EL 7.24 I C \ ( __ _ `EL 7.24 C - I / EX 12"D EX6"D O SECTION (TYPICAL FOR SECONDARY CLARIFIERS 1 AND 2) 13D06 SCALE:3/16"=V-0" FILE:10340A1013S9301 D D d e E. ,,, L—L—Li.r___ r WAWq4j/ I i e,-1 ,_8 Z ArAr.,Z d', 41 1 0r y A ��A.�!I.4/iP4�! ' I� �� - �� Imo' i/.��I/� �� K.I�,AM—,"Air %%1'-- I F F EL 9.24 i ,-....___ --- ..imriglir rprAm 4iie — --- o (TOP OF GROUT) EL 8.55 / ,; 0 - g EL 7.24 \ - -T X 1� J SAVE PIPE AND FLANGE D SECTION (SECONDARY CLARIFIER NO. 3) 13D07 SCALE:3/16"=1'-0" FILE:10340A1013S9301 m DESIGNED VERIFY SCALES JOB NO. rn G RJN oQµ0FES5/O,ygl E': VEOLIA 1o340A.10 G E DRAWN Fe�e�N 6.40C Fyc ORIGINAR IS AL E INCH ON ON DRAWING NO. m JDJ �� m ® WWTP CRITICAL IMPROVEMENTS PROJECT °w CHECKED w x No.77655.4- car0„� VEOLIA DEMOLITION 0®1" 13D08 rn JAW sT ,. SECONDARY CLARIFIERS IF NOT ONE INCH ON SHEET NO. N DATE 9TF FIVA`�O�? WATER THIS SHEET,ADJUST C SCALES ACCORDINGLY REV DATE BY DESCRIPTION OCTOBER 2017 DEMOLITION SECTIONS 166 OF 317 1 I 2 I 3 I 4 I 5 I 6 I 7 I 8 I 9 I 10 I 11 12 1 13 PROJECT NO.10340A.10 FILE NAME: 10340A1013D08.dgn 1 1 2 I 3 1 4 I 5 I 6 I 7 I 8 I 9 I 10 I 11 I 12 I 13 1 2 GENERAL NOTES: 1. ALL WORK AND REQUIREMENT SHOWN IN PHOTOS SHALL BE ,, r_ a k.. - �� - COMPLETED FOR SECONDARY CLARIFIER NO 1 AND 2. v _ - �� r■ N 't 2. SEE SECTION 01140 FOR SECONARY CLARIFIER WORK SEQUENCE J esi . } .I •1,. r AND CONSTRAINTS. E, A _ _ - 3. CUT ALL ANCHOR BOLTSFLUSH WITH CONCRETE AND COAT PER A F _ _ T •�- R„ _. _.. " �� _ - ___-. _ _ 4 s.- SECTION 01732/3.02/4. m - y 4. DEMOLISH ALL ACTIVEAND ABANDONED EXPOSED CONDUITS AND w �. - = — - . r iii__- - WIRES ASSOCIATED WITH THE SECONDARY CLARIFIERS,INCLUDING F _ -_ _ __ BUT NOT LIMITED TO:POWER TO THE DRIVES,POWER AND �' �1 R1 4-- , 74111 CONTROL TO THE LOCAL CONTROL PANEL,LIGHTING,AND THE '5 -" —r -- - /.. - MOTORIZED ROTATING SCUM SKIMMER.WIRES SHALL BE REMOVED a_ ��, --A c - - _,ti ��s-" - FROM THE CLARIFIER MECHANISM SOURCE TO THEIR ORIGIN.LE. MCC,POWER PANELS OR PLC. </ ■+i��, _ �` R „+ � — 0 KEY NOTES:=O _ `� -1 / 1. EXISTING WEIRS,LAUNDER TROUGHS,AND ASSOCIATED • 1 d, \ c SUPPORTS TO REMAIN. B - 44�III"I - 2. EXISTING SCUM BAFFLE AND ASSOCIATED SUPPORTS TO B'. °-!_ // 'f - REMAIN. �� ., - ( / - _ 3. DEMOLISH CLARIFIER MECHANISM EQUIPMENT INCLUDING _ •\ WALKWAY/BRIDGE,MIXED LIQUOR TROUGH LOCATED .. / _ UNDER WALKWAY BRIDGE,CENTER PLATFORM,FEED WELL, INLET WELL,SLUDGE SCRAPER RAKE ARMS,CENTER CAGE, ��• • -. • 4. '�. _ / - CENTER COLUMN,ROTATING SCUM SKIMMER,SPRAY i 1i - — WATER PIPING,AND ALL OTHER ASSOCIATED ITEMS. �- / �'' y��'`�� ;t 4. PERIMETER HANDRAIL TO REMAIN. 111 3 P1 PHOTO © P2 PHOTO C 13D06 SCALE:NTS 13D06 SCALE:NTS C FILE:IMG_1915 FILE:IMG_1916 PS L - 1 _, .,ir - -- � r;' ///_ 1F a c,- —-1,-7-,* t)\--l' '.r iii."'"414)*- -,6��' . irt - _ T n NI y Sa 4 'M"- _ - -- , 1 E V �.• S E � �,.,- L�� 'ate• _ 1 ... g, rolvf------7446.----- -orf.,4,-- -.- „ ,„, -q Ftwp 41 I i Or dipe.- z - ; 0 __--__ 4, 21^ -I-i- 1-"' TA divr, ,, ::- ... fi . � ilillatAXVK P3 PHOTO P4 PHOTO 13D06 SCALE:NTS 13D06 SCALE:NTS FILE:IMG_1917 FILE:IMG_1918 m DESIGNED VERIFY SCALES JOB NO. rn G RJN oQµOFESS/ONq( o:F, VEOLIA 1o34oA.10 G E DRAWN Fe�e�N E. Fyc ORIGINAR IS AL E INCH ON ON DRAWING NO. JDJ 2, m ® WWTP CRITICAL IMPROVEMENTS PROJECT °w CHECKED w x No.77655�' ��0„� VE O`I A DEMOLITION 0®1" 13D09 ur JAWlir sT �. SECONDARY CLARIFIERS 1 AND 2 IF NOT ONE INCH ON SHEET NO. N DATE 9TF FIVA`�O�? WATER THIS SHEET,ADJUST > C REV DATE BY DESCRIPTION OCTOBER 2017 DEMOLITION PHOTOS SCALES ACCORDINGLY 167 OF 317 1 I 2 I 3 I 4 I 5 6 I 7 I 8 I 9 I 10 I 11 I 12 1 13 PROJECT NO.10340A.10 FILE NAME: 10340A1013D09.dgn 1 I 2 I 3 I 4 1 5 I 6 1 7 I 8 I 9 I 10 1 11 I 12 1 13 v B I 13S10 o. ti I '\) I N �\�� N '\) I GENERAL NOTES: v I 1. CONTRACTOR TO FIELD VERIFY ALL DIMENSIONS AND ELEVATIONS. KEY NOTES:=O# o A O 1. INJECT ANY VISIBLE LEAKING CRACKS WITH A A o = CL I CL POLYURETHANE INJECTION SYSTEM IN ACCORDANCE WITH O SECTION 03933.REFER TO DETAIL S204/TYP FOR TYPES OF CONCRETE REPAIR DETAILS AND SECTION 03926 FOR - CONCRETE REPAIR MATERIALS FOR REPAIR REQUIRED AT J EXPOSED REBARS. CI d 1 // ° (TYP ALL \ / 2. DEMO EXISTING 2"±BASIN BOTTOM GROUT.ROUGHEN a— / O AROUND) ��\ / / EXISTING CONCRETE SURFACE.INJECT ANY VISIBLE / \ \ / / CRACKS WITH A POLYURETHANE INJECTION SYSTEM IN / 2:1(TYP) . \ \ / / ACCORDANCE WITH SPECIFICATION SECTION 03933.PLACE / °�� - \ \ / / — - 2"t GROUT FILL TO COVER ENTIRE FLOOR SURFACE PER \ SPECIFICATION SECTION 03565. 3. PRESSURE RELIEF VALVE,SEE DETAIL 4/13S14. 1 / ° I. '-.° ° 4. BLAST EXISTING METAL STRIP AT BASE OF WALL.COAT B / I - \ 1 . WITH HIGH SOLIDS EPDXY PER SPEC SECTION 09960. B D I I 1 INCEILL(TYP)NCRETEII I - b.° I Q 1 1 I° �I TOP OF GROUT TOP OF GROUT EL 12.39 AIL (TYP ALL J EL 12.39 I C AROUND) °P I C M Ig ICO 2 °- i �° •R,ZcjA o x :mod"—*"�"� 10 y// WI w / �� hil Ico eta 1 'I6 441* 1 r ILA'e OHO } O I 4 I I s \ *a* o0m� 7,x I ° �/ (TYP ALL J \V % I° a 1I- D ' ° s GYP) D I b �®' m CONCRETE INFILL TO - d I o ° ° • , .. ; ° - LEVEL CLARIFIER ® "° I a BOTTOM(TYP) c cI th 9° I P. - SFCON0ARY(11 ARIFIFR NO 1 I a'_I ® SFCONDARY CI ARIFIFR NO 2 2 E 1 I T 1 I 1 I E a g \ - I SEE DETAIL 6/13514 f e 1 ° 1 I 1 1 \ , - FOR PARTIAL PLAN I \ °e " \ 1 OF LAUNDER AND ° . ° ° ° p ° • SCUM BAFFLE I . ° \�' m ° • SUPPORTS ABOVE a° " _ ° 4.. T . ,,,, .. ———--,—7 / o f - L - I [ I F 8 1 I _ 57'-0" _ 56'-4" _ 56'-4" 58'-4" — 228'-0" __ _ SECONDARY CLARIFIERS 1 AND 2 ASCALE:1/8"=1'-0" FILE:10340A1013S110 VERIFY SCALES m DESIGNED "n..,,r.., """"" VEOLIA 10340A.10 G JOB NO. iG MJH QpoFESSioN m DRAWN N i�~e�yj PLR SAP i �� WWTP CRITICAL IMPROVEMENTS PROJECT BAR IS ONE INCH ON w D A m caro/%° VE O L I A ORIGINAL DRAWING DRAWING NO. CHECKED * No.75661 * STRUCTURAL 0 1" 13S09 111 N MED sT ,. SECONDARY CLARIFIERS 1 AND 2 IF NOT ONE INCH ON SHEET NO. I.77 DATE 9T�, CIV1V O�� WATER THIS SHEET,ADJUST REV DATE BY DESCRIPTION OCTOBER2017 OF CAL PLAN SCALES ACCORDINGLY 168 OF 317 1 I 2 I 3 I 4 1 5 1 6 1 7 I 8 1 9 1 10 1 11 1 12 1 13 PROJECT NO.10340A.10 FILE NAME: 10340A1013S009.dgn 1 I 2 I 3 I 4 I 5 I 6 I 7 I 8 I 9 I 10 I 11 I 12 I 13 CL GENERAL NOTES: g EL 29.94 1. CONTRACTOR SHALL FIELD VERIFY ALL DIMENSIONS. r,:"! L H I IV KEY NOTES:=O# 1. ANCHOR REINFORCEMENT SHALL BE DESIGNED BY THE o• A 1__ — — CLARIFIER MANUFACTURER AND PROVIDE SUPPLEMENTAL A Q REINFORCEMENT AS REQUIRED. Z o EL 20.75 I 2. SEE MECHANICAL DRAWINGS FOR PIPE CONNECTION DETAILS. 0 3. WIDTH TO BE DETERMINED IN FIELD. a_ I 4. FORM 1"DEEP PERIMETER FOR GROUT TERMINATION.DO NOT FEATHER EDGE. r TOP OF GROUT TOC EL 12.22 TOP OF GROUT 5. DEMO EXISTING GROUT BEFORE PLACEMENT OF NEW EL 12.39 EL 12.39 CONCRETE. EL 12.39 Ark B — / I .p LJ I EXISTING SLAB O B I- '�l EX-12"D) EL 7.23 I I I p / EL 7.23 I l 1 N I I I I 20-1"DIA SST Z, __ ' \` MIN)ANCHOR BOLTS O — — — — ��'— — — — — — MANTES AND GUSSET MANUFACTURER ti) EXISTING CENTER BASE C B SECTION c 3S09 SCALE:3/16"=1'-0"FILE:10340A1013S330#5 DOWELS AT 18"WITH 8"OF EMBEDMENT(TYP)#5 BAR@6"EW c o MASS CONCRETE PER m SPECIFICATION SECTION 03302 tD c ROUGHEN EXISTING CONCRETE SURFACE TO 1/4"AMPLITUDE. c D N D — 25'-°" 1 1 DETAIL i. 'IL- 13S09 SCALE:3/8"11'-0" SCA:E:3/8"=10' EXISTING SLAB MASS CONCRETE PER SPECIFICATION SECTION 03302 �{, .2-#5 SUPPLEMENTAL BARS(MIN) ,d /'► #5 BARS @ 6"(TYP) / v °f C SECTION 2'-0" 6"MIN LAP _ 2"OF GROUT ROUGHEN EXISTING CONCRETE- 4 of 13509 SCALE:3/8"=1'-0" O SURFACE TO 1/4"AMPLITUDE PER SPECIFICATION a al FILE:10340A1013S330 ROUGHEN CONCRETE 5 SECTION 03565 TO 1/4"AMPLITUDE O EL 10.39 #5 CIRC BARS @ 6"(TYP) coI EL 12.39 1 • E _ �� _ E t MMINIONtir.. 22,:,,, — 2 ‘ _ — • N ED I." ... ��. �..♦ 141#5 DROP BARS — / • 4"MIN i%/ 2 _ — �■.��.••..••.•..♦. 141#5 FULL LENGTH BARS EXISTING CONCRETE I Y — 1 / — — - - EL 7.24 • rn "'11♦,,,,,, .•..•.•...•.. / — _/ I WITH 6"OF EMBEDMENT(TYP)1►► �1, ►jjjj4��.��♦ P I--I-- © F 7c1I•i��•c�v$0*�� EXISTING CENTER BASE D REINFORCEMENT PLAN DETAIL SCALE:3/8"=1'-0" SCALE:3/8"=1'-0" FILE:10340A1013S403 FILE:10340A1013S330 VERIFY SCALES 4 DESIGNED L R "p.,,r.., W",,. JOB NO. VEOLIA 10340A.10 G 3 G MJH oQµ0FES5/ONq� m DRAWNJDJ i�~�yjP STD i WWTP CRITICAL IMPROVEMENTS PROJECT BAR IS ONE INCH ON 9 c �E O I A ORIGINAL DRAWING DRAWING NO. o CHECKED *D No.75661 A* car0„�.(i) STRUCTURAL 0®�� 13S10 N MED sT ,. SECONDARY CLARIFIERS 1 AND 2 IF NOT ONE INCH ON SHEET NO. N DATE T'OF ID �'''. WATER THIS SHEET,ADJUST REV DATE BY DESCRIPTION OCTOBER2017 O SECTIONS AND DETAILS SCALES ACCORDINGLY 169 OF 317 1 I 2 I 3 I 4 I 5 6 I 7 I 8 I 9 I 10 I 11 12 1 13 PROJECT NO.10340A.10 FILE NAME: 10340A1013S010.dgn 1 I 2 I 3 I 4 I 5 I 6 I 7 I 8 I 9 I 10 I 11 I 12 I 13 GENERAL NOTES: g 1. CONTRACTOR SHALL FIELD VERIFY ALL DIMENSIONS AND a -u ELEVATIONS. R z H KEY NOTES:=O 1. INJECT ANY VISIBLE CRACKS WITH A POLYURETHANE E A I INJECTION SYSTEM IN ACCORDANCE WITH SECTION 03933. A I REFER TO DETAIL 5204/TYP FOR TYPES OF CONCRETE O REPAIR DETAILS AND SECTION 03926 FOR CONCRETE N Z REPAIR MATERIALS FOR REPAIR REQUIRED AT EXPOSED AREBARS. x 2. DEMO EXISTING 2"2 BASIN BOTTOM GROUT.ROUGHEN o I ___— - _ EXISTING CONCRETE SURFACE.INJECT ANY VISIBLE 15— I — —_\ CRACKS WITH A POLYURETHANE INJECTION SYSTEM IN ACCORDANCE WITH SPECIFICATION SECTION 03933.PLACE ' 2"±GROUT FILL TO COVER ENTIRE FLOOR SURFACE PER / SPECIFICATION SECTION 03565. \ OUTSIDE EDGE OF /// N SUSPENDED WALKWAY N / N I / I N B / - / B / A---\ a I / / \/ 1 'S N\\\ .0.0% s_ I I I / y9b C vv C I - — — — I 1 o I MI I 31 TOP OF GROUT VARIES I 2:1 SLOPE W — — — — -L (TYP) O co I D I ♦ ��° °�, W M D I 6 < I a, - CONCRETE INFILL I nilri I DETAIL m \ " / SCALE:3/8"=T-0" \ " °IAik • / FILE:10340A1013S110 oI \ - / aI I \ Mir / / co, I \ / o E / E U / ED o I I / ti m y 6 i I / F F U F a _ 8 g D SECONDARY CLARIFIER 3 FILE:10340A1013S110 VERIFY SCALES m DESIGNED ",,.,,r.., W",,. VEOLIA 10340A.10 G JOB NO. rn G MJH QµoFEss/oN m DRAWN N /t c' jPLR SAP i WWTP CRITICAL IMPROVEMENTS PROJECT BAR IS ONE INCH ON -� 9 �' ORIGINAL DRAWING DRAWING NO. CHECKED 3‘"_,,,, No.75661 * c) vE `I A 0®1" 13S11 U A m C��O o STRUCTURAL N MED sT ,. SECONDARY CLARIFIER 3 IF NOT ONE INCH ON SHEET NO. N DATE 9TF OF IAA�FO�� WATER THIS SHEET,ADJUST REV DATE BY DESCRIPTION OCTOBER2017 C - PLAN AND SECTION SCALES ACCORDINGLY 170 OF 317 1 I 2 I 3 I 4 I 5 6 I 7 I 8 I 9 I 10 I 11 I 12 1 13 PROJECT NO.10340A.10 FILE NAME: 10340A1013S011.dgn 1 I 2 I 3 I 4 I 5 I 6 I 7 I 8 I 9 1 10 I 11 I 12 I 13 GENERAL NOTES: 22'-0"+ 1. CONTRACTOR SHALL FIELD VERIFY ALL EXISTING DIMENSIONS a AND ELEVATIONS. F! O O ,v - — 6'-3„t KEY NOTES:_O. 1. EXISTING ROCK ANCHORS.FIELD VERIFY ALL LOCATIONS E, A OF ANCHORS,DO NOT DAMAGE OR DISTURB.IF NEW A DOWELS COME IN CONFLICT WITH IE ROCK ANCHORS SHIFT z 1'-0"CLR 2-#5 SUPPLEMENTAL BARS(MIN) AS NECESSARY i2"IN ANY DIRECTION. `C,' r (TYP) #5 BARS 2. ANCHOR REIFOREMENT SHALL BE DESIGNED BY THE 1 O ROUGHEN CONCRETE a @6 (TYP) CLARIFIER MANUFACTURER AND SHALL PROVIDE TO 1/4"AMPLITUDE #5 CIRC.BARS 2"GROUT PER SPECIFICATION > SUPPLEMENTAL REIFORCEMENT AS REQUIRED. r 6"(TYP) SECTION 03565 •a_ ROUGHEN CONCRETE 2" MIN ce TOC 8.07 @ TOG 8.07 O F 3. COORDINATE REINFORCEMENT AND ROCK ANCHORS WITH TO 1/4"AMPLITUDE 1 (T$P) ) O _ EXISTING AS BUILT DRAWINGS. �� 4. FORM CUT 1"DEEP PERIMETER FOR GROUT TERMINATION. i�il��• - -� DO NOT FEATHER EDGE.'� .� _ II II ' Ir III EL 6.75 1 I — L• 5. EXISTING SLAB CHANGES SLOPE APPROXIMATELY 22'-0" © #5 DOWEL @ 12" 4"MIN 1 FROM CENTER OF CLARIFIER. HORIZ.&RADIAL — / 6. CLARIFIER SLAB SLOPES AT 1/4":12"FROM FACE OF WALL B WITH 9"OF B EMBEDMENT(TYP) ——T TO 22'-0"FROM CENTER OF CLARIFIER. EXIST TOC EL 8.39±. NEW GROUT(TYP) _ - - _ _ �( o 6" __ _91— ____-j 7. NEW CONCRETE SLAB TO SLOPE AT 1/4":12"TO MATCH EXISTING. ,/ a a V. F\- C , S" I 1 U \ ( I \\ 7. �) 12-#7 DOWELS MIN- I CONCRETE SHALL f:n 4 \- BE 1/4"AMPLITUDE #7 DOWELS @ 12" HORIZ.&RADIAL WITH 12"OF C EMBEDMENT(TYP) 1 3 C _ 16 1 _ a E SECTION 13511 SCALE:3/8"=1'-0" FILE:10340A1013S330 D D 7. e. al ninif� •• •.•�•• 138#5 DROP BARS 4 ��11/11I, I*�� 1��1�� o E „1111,•••�••. �• .... 138#5 FULL LENGTH RADIAL BARS E 1111110/40 Ilk CL 11.111**44 � ��111♦ a, I/4 0000..Nristisialsig d :rome.::::iiiii :i��C:::iiiii o - D F F O REINFORCEMENT PLAN SCALE:3/8"=1'-0" c FILE:10340A10135403 g VERIFY SCALES 4 DESIGNED L R "",,,r.. "a„" VEOLIA 10340A.10 G JOB NO. G MJH oQµ0FES5/ONq� m DRAWNJD i�~ yjP SAP i ` .1111r WWTP CRITICAL IMPROVEMENTS PROJECT ORIGINBAR IS AL INCH ON 9 c .(i0:01 �E 0 I A DRAWING DRAWING NO. o CHECKED *U No.75661 A* ��0„� 0®1" 13S12 STRUCTURAL 11 N MED sT ,. SECONDARY CLARIFIER 3 IF NOT ONE INCH ON SHEET NO. N DATE 9TF OF IAA�FO�� WATER THIS SHEET,ADJUST REV DATE BY DESCRIPTION OCTOBER2017 C SECTION AND DETAILS SCALES ACCORDINGLY 171 OF 317 1 I 2 I 3 I 4 I 5 6 I 7 I 8 I 9 I 10 I 11 12 1 13 PROJECT NO.10340A.10 FILE NAME: 10340A1013S012.dgn 1 I 2 I 3 I 4 I 5 I 6 I 7 I 8 I 9 I 10 I 11 I 12 I 13 GENERAL NOTES: 8"THICKENED Mk-ALL ALL 1. CONTRACTOR TO FIELD VERIFY REQUIRED DIMENSIONS.LOCATE Q BEHIND EXISTING WALL ALL EXISTING REBAR PRIOR TO DRILLING. #6 DOWELED INTO EXISTING c v WALL WITH 6"MINIMUM EMBED. KEY NOTES:=O o A 1. TEMPORARILY SUPPORT EXISTING DUCT BANK DURING THE A • CONSTRUCTION OF THE NEW CONDUIT BELOW AND co O Z EXISTING WALL I • I I CONSTRUCTION OF THE NEW 8"THICKENING OF THE O 11 • EX-6"1W EXISTING WALL. N = • 2. SAW CUT HOLE IN EXISTING WALL FOR NEW DUCT BANK. EXISTING DUCT BANK,ABOVE EXISTING DUCT BANK CAST HOLE IN NEW 8"CONCRETE.PROVIDE EXPANSION CI MATERIAL ALL AROUND DUCT BANK IN EXISTING a— 1----- i� WALL AND NEW WALL PER DETAIL EM070/TYP. EX-18"PDR ) 3. REFER TO DRAWING 00E07 FOR PENETRATION LOCATION IN NEW DUCT BANK GALLERY. GALLERY O N Z PENETRATION z t\ I� I-z m B II I \ B z II I z U .J NEW DUCT BANK t 1 — I CLR '8MIN I C z I NEW DUCT BANK,BELOW Z. 0 z S ''4' EX-18"PDR - •• FLOOR EL±10.00 . I 4-#6 EACH SIDE • % - ti 4-#6 8 —'\i— EDGE OF THICKENED WALL BEHIND ROUGHEN SURFACE TO ' 1/4"AMPLITUDE B SECTION ENLARGED PLAN C A SCALE 1"=1'-0" NEW WALL - SCALE:3/4"=1'-0" D FILE:10340A10135120 Cr FILE:10340A10135340 D EXISTING DUCT BANK NOTE:REFER TO SECTION Cl-FOR ADDITIONAL WALL REINFORCEMENT NOT SHOWN. • 1 A Z S N z k z a o 3 #6 IS =I 1 (..\777: C I I C � o E E U tt Z 0 ti R © C •\\`NEW DUCT BANK d #48612"WITH STD HOO &4 EMBEDMENT(TYP) 0 O F r ®I —#6@12" F z g FLOOR EL±10.00 /// EXISTING WALL} I Ij-#6 DOWEL(D 12" LLLJJJ WITH 6"MIf�IMUM EMBED INTO FLOOR SECTION SCALE:3/4"=1'-0" 41, FILE:10340A1013S340 VERIFY SCALES m DESIGNED ""..,,r.., "a.". VEOLIA 10340A.10 G JOB NO. 4 G CRS Qµ0FES5/ON E DRAWN �FeFyt pl R.SAP i WWTP CRITICAL IMPROVEMENTS PROJECT ORIGINBAR IS AL INCH ON w D A caro/%+° V E O I A DRAWING DRAWING NO. CHECKED * No.75661 * STRUCTURAL 0®1" 13S13 N MED sT ,. DUCT BANK PENETRATION IF NOT ONE INCH ON SHEET NO. N DATE 9TF OFI�A�FO�� WATER THIS SHEET,ADJUST REV DATE BY DESCRIPTION OCTOBER 2017 C THROUGH GALLERY WALL SCALES ACCORDINGLY 172 OF 317 1 I 2 I 3 I 4 I 5 I 6 I 7 I 8 I 9 I 10 I 11 12 1 13 PROJECT NO.10340A.10 FILE NAME: 10340A10135013.dgn 1 2 I 3 I 4 I 5 I 6 I 7 8 9 10 11 I 12 I 13 GENERAL NOTES: 1. REPAIRS APPLY TO SECONDARY CLARIFIERS 1 AND 2 ONLY. o_a 2. ALL METAL REPAIRS SHALL BE CONDUCTED AFTER ABRASIVE kq BLASTING METALS AND PRIOR TO COATING. LS esi 2. AFTER ABRASIVE BLASTING,CONDUCT INSPECTION OF STEEL FOR CORROSION AND PITTING.WHERE LOSSES EXCEED 1/8",PROVIDE REPAIR PER DETAIL 11/13S15.WHEN REPAIR LOCATIONS ARE o A CLUSTERED,USE OVERSIZE PLATE TO COVER.INFORM ENGINEER A '1 WHERE REPAIRS AS DETAILED ARE NOT APPLICABLE AND O REPLACE SUPPORTS AS INDICATED BY ENGINEER(ASSUME 4 SUPPORT MEMBERS TO BE REPLACED PER SECONDARY `� CLARIFIER). ti NEW PRESSURE RELIEF VALVE r CI SPEC SECTION 15118. .. EL 23.5± KEY NOTES:=O a_ PVC PIPE TO MATCH NEW " PRESSURE RELIEF VALVE 1. ABRASIVE BLAST METALS FOR LAUNDERS,SUPPORTS AND GROUT EXISTING _° SCUM BAFFLE PER SPEC SECTION 09960,SSPC SP 10.NOTE, LAYER SCUM BAFFLE SP 13 MAY BE USED IF LAUNDERS ARE GALVANIZED AND 3/8"x18"(CONY) ® GALVANIZING IS IN GOOD CONDITION.COAT EXISTING y CONCRETE METAL SURFACES WITH HIGH SOLIDS EPDXY COATING PER INFILL — O SECTION 09960. _ ry ii�T �.WQ.� 2. REPLACE EXISTING BOLTS WITH NEW STAINLESS STEEL B WEB OF " A BOLTS,TYPE 316. B C 8x13.75 EXISTING _ J. 3. DISMANTLE EXISTING V-NOTCH WEIR TO COAT. t FLOOR SLAB-N O NEW 3/4"0 _ � ,'a REASSEMBLE WEIR AND PROVIDE SYNTHETIC RUBBER a a BOLTS(TYP) I SEALING COMPOUND PER SPEC SECTION 07900 AT EDGE OF .o I �. WEIR AND LAUNDER.LEVEL WEIRS IN PLACE.LICENSED �ea��..wr ak-:w..-�a+�,ne-gs ..� +m,,mer a.-........�.». -7, dam.-- ,,.--•.... ..e/IIC.%IvIlArl ., .1 �rs�' SURVEYOR TO VERIFY LEVEL WEIR AT EL 23.64. REMOVE TOP 4"OF EXISTING FILL WITH NON-SHRINK GROUT T. 4. REMOVE LOOSE GROUT BEHIND WALL CHANNELS AND — DRAIN ROCK;WASH CLEAN I -------- �'^�' ""`'""'xsP'�'^ -�"�'_ 'Y= "-^^�"x�'"--- '�'- eP '" 4`P '� �'��""'$"d"a�^ ==p"°�-°"� -"""'"" - REINSTALL NON-SHRINK GROUT WHERE REQUIRED.SEE — ROCK AND REINSTALL W© DEMOLISH EXISTING VALVES I. PHOTO 13/13515. VARIES 6'-4" - 5. FOR ALL BUILT-UP MEMBERS,SEAL EDGES WITH SYNTHETIC _ 4 DETAIL APPROX 12'-0"MAX RUBBER SEALING COMPOUND PRIOR TO COATING AND AFTER ABRASIVE BLASTING.SEE DETAIL 7 FOR TYPICAL 13S09 SCALE:1"=1,0" BUILT-UP SUPPORT. C FILE:10340A1013S403 DETAIL C 6. NEW STAINLESS STEEL,TYPE 316,STRAP AROUND TS 13S10 SCALE:NO SCALE BEAMS AND CLAMPED OVER EXISTING ANGLES.TYPICAL FILE:10340A1013S403 ALL SUPPORTS.SST STRAP 1/4"x3". 7. EXISTING ANGLE,REPAIR PER DETAIL 9/13S15 WHERE ANGLE IS DETERIORATED WITH OVER 1/8"LOSS. D D II esi y ..... Ell ._ .._ ... .. _ _ .. .... .....i....... EXISTING ANGLE O o EXISTING WEIR&EFFLUENT a LAUNDER(TYP) n EXISTING BAFFLE I ' S (TYP) EXISTING HSS I O m SUPPORTS I I El 3/4"0 SST BOLT(TYP) IPIPP 01 I SEAL ALL AROUND EXISTING BUILT UP ANGLE W/SYNTHETIC llia1 - �•-' RUBBER SEALING � OR PLATE rnIICOMPOUND(TYP) 1 EXISTING HSS 2 E EXISTING BRACE , I IPI E 3 II (TYP OF 4 PER 0 rn �\\ I I O CLARIFIER) NOTE:SST STRAP NOT SHOWN. 1-a- � �c DETAIL 8 DETAIL 10 „„ _......\ ) SCALE:NO SCALE - SCALE:NO SCALE 1. \,r l/ 1 \ FILE:10340A1013S403 FILE:10340A1013S403 rn 1 \ a \ \ 0 c \� \ \ 10 (TYP AT BOTH O F \ 13S15 LAUNDER OUTLETS) F 'o I II II (I I II , i II g- �-1r/ I 6 DETAIL 13S09 SCALE:NO SCALE FILE:10340A1013S403 VERIFY SCALES m DESIGNED a..,"', W"... VEOLIA 10340A.10 G JOB NO. rn G CS Qµ0FES5/ON E DRAWN S"d-jPL R.5,T U WWTP CRITICAL IMPROVEMENTS PROJECT BAR IS ONE INCH ON -V.,. c) \/E O L I A ORIGINAL DRAWING DRAWING NO. CHECKED *D No.75661 * ��0„�O 0®1" 13S14 STRUCTURAL N MED sT ,. SECONDARY CLARIFIER IF NOT ONE INCH ON SHEET NO. N DATE 9TF OFI�A�FO�� WATER THIS SHEET,ADJUST REV DATE BY DESCRIPTION OCTOBER 2017 C NO 1 AND 2 DETAILS SCALES ACCORDINGLY 173 OF 317 1 I 2 I 3 I 4 I 5 6 I 7 I 8 I 9 I 10 I 11 I 12 1 13 PROJECT NO.10340A.10 FILE NAME: 10340A1013S014.dgn 1 2 I 3 I 4 I 5 I 6 I 7 I 8 I 9 I 10 I 11 I 12 I 13 GENERAL NOTES: a 1. ALL METAL REPAIRS SHALL BE CONDUCTED AFTER ABRASIVE BLASTING METALS AND PRIOR TO COATING. iV s A A H U O N N 0 a— LAUNDER CL I I EXISTING LAUNDER o d l, 3/16\ TYP ALL AROUND PITTING IN STEEL MEMBER 2"MIN ALL AROUND 4 E FACE OF WALL li 3/16I TO SEAL EDGES t0 NEW 1/4"PLATE 3/16 EXISTING LAUNDER `v p aAlif NEW 1/4"PLATE — CUT EXISTING ANGLE LEG AND REMOVEE a `a WASHER.CUT EXISTING NELSON STUD. 'I_ -_ 'h—= I7= REPLACE W/NEW 6"x4"x1/4"PLATE. v 1 I�I EXISTING HSS 'ax Da - ypy 4..v imum------. 3/16"PLATE v 3/16 STEEL MEMBER C C 6" NOTE:ASSUME 20%OF ANGLES REQUIRE REPAIR 9 DETAIL 10 DETAIL 11 DETAIL SECTION 13014 SCALE:NO SCALE 13S14 SCALE:NO SCALE 13S14 SCALE:NO SCALE SCALE:NO SCALE FILE:10340A1013S403 FILE:10340A1013S403 FILE:10340A1013S403 FILE:10340A1013S403 D REMOVE ANY LOOSE GROUT BEHIND D CHANNEL.REINSTALL NON-SHRINK GROUT BEHIND.REMOVE CHANNEL AS REQ'D. INFORM ENGINEER IF ANCHOR BOLTS y INJECT CRACK W/POLYURETHANE NEED TO BE CUT.INSTALL NEW ANCHOR INJECTION SYSTEM PER SPEC 03933. OLTS AS DIRECTED BY ENGINEER. N (A SUMS 4 REPAIRS PER CLARIFIER). a + ti•_e: m _ t\\\ 13, f,,I E •qq E U 5. o ti 1.7 �r U F s.; F o 8 12 PHOTO 13 PHOTO 13009 SCALE:NO SCALE 13S14 SCALE:NO SCALE FILE:10340A1013S15B FILE:10340A1013S15C VERIFY SCALES m DESIGNED an..,,r.., "",,. VEOLIA 10340A.10 G JOB NO. rn G CS Qµ0FES5/ON UE DRAWN ( O.75661 " lR.SAP .11111r WWTP CRITICAL IMPROVEMENTS PROJECT BARISONEINCHON ®('D VEOLIA ORIGINALDRAWING DRAWGNO. O CHECKED A* ��0„� O®1° 13S15 STRUCTURAL N MED sT ,. SECONDARY CLARIFIER IF NOT ONE INCH ON SHEET NO. N DATE 9TF OFI�p 1F0�� WATER THIS SHEET,ADJUST REV DATE BY DESCRIPTION OCTOBER 2017 C NO 1 AND 2 DETAILS SCALES ACCORDINGLY 174 OF 317 1 I 2 I 3 I 4 I 5 I 6 I 7 I 8 I 9 I 10 I 11 I 12 1 13 PROJECT NO.10340A.10 FILE NAME: 10340A1013S015.dgn 1 I 2 I 3 I 4 I 5 I 6 I 7 I 8 9 10 11 12 13 KEY NOTES:=O a 1. EXISTING SCUM BAFFLE TO REMAIN.RECOAT SUPPORTS PER SECTION 09960.FIBERGLASS MATERIALS DO NOT z REQUIRE RECOATING. e 0 2. EXISTING WEIRS,LAUNDER TROUGHS AND ASSOCIATED /- 8 O SUPPORTS TO REMAIN.RECOAT PER SECTION 09960. N A C FIBERGLASS MATERIALS DO NOT REQUIRE COATING. A I o O 13M20 3. NEW SECONDARY CLARIFIER MECHANISM PER SECTION Iki 0 h 11353A. ti = I I I I — 4. SCUM SKIMMER ASSEMBLIES.CLARIFIER MANUFACTURER o TO DETERMINE SIZE AND METHOD OF SUPPORT. n__ 7 I C} 5. SCUM BEACH CLARIFIER MANUFACTURER TO DETERMINE 6"SC FXIST CONTROL TOC 29.94 I SIZE AND METHOD OF SUPPORT. MODIFY EXISTING SCUM 11—T � TO WALKWAYO® RIM OINO ( 6"SC TO WALKWAY O® BAFFLE AS REQUIRED TO ACCOMMODATE NEW SCUM BEACH. 6. TOP OF WALKWAY ELEVATION TO BE DETERMINED BY 5 I 5 I ��V CLARIFIER MANUFACTURER. \ III - I 1 I111 I �v I I I ! III / A A III - III A 7. SIZE TO BE DETERMINED BY CLARIFIER MANUFACTURER. B NEW SCUM \\ I \ B BEACH(TYP) IS I I I EX 12"D 10 \ / 8. CONNECT TO EXIST 6"SC WITH FERNCO STYLE FLEXIBLE' I J � 1� I 11 EX 12"D 10 COUPLING. \ / / I I I I / V'" EX 24"RAS �� III I I \ 9. PROVIDE TRANSITION PIECE BETWEEN NEW CLARIFIER •ASI I I 11// 1 / I \I I III 1 I WALKWAY AND EXISTING CONCRETE STAIRS.MATERIAL TO y I I I ( EX 6"D )O I 1 I I" � EX 6"D I)O I 1 MATCH CLARIFIER WALKWAY. — 24'-0"DIA I I I/ O IIII II FLOCULATING I I I I 10 PIPES ARE ENCASED AND LOCATED BELOW BOTTOM OF — WELL(TYP) I/ O I I I SLAB. y III �I�l �� 111 I , III 1 11. NEW DRAIN PIPE SUMP.SEE STRUCTURAL DRAWINGS FOR I I I I Q�� I I I I I I ADDITIONAL INFORMATION. O I I/ 0.'p J0 I I I I I 1 I 12. WALKWAY LIVE LOAD 100 PSF. ? I I I I 13M2 13. THE EXISTING WEIRS ARE NOT LEVEL.THE CONTRACTOR C ��E`' .\ © I I O 'A` ��\ I I) I III O SHALL OF CALF ORNIA TO SURVEY ANDMPLOY A LAND ESTABLISH STABLISHD IN THE THE TOP OF STATE C -�� I 1 AZAlk �r� © I WEIR ELEVATIONS AT 10 FOOT INTERVALS(BOTH SIDES OF * �`m I _ O �A"L 11 I TROUGH)AROUND THE ENTIRE PERIMETER OF EACH �j�`'\ ® ��\� N CLARIFIER.SUBMIT RESULTS TO ENGINEER FOR REVIEW. �N �,.� 411110.1 "v�,` I , 1 2 AFTER REVIEW,THE ENGINEER WILL DIRECT THE '�C co CONTRACTOR TO PROCEED WITH BID ALTERNATE"A"OR i `�\ ! ,� a at,ems (9 ,:�. Cie �c r> �e ' Ia Y — — — — `Y ill' �' �I 14. BID ALTERNATE"A'-ENGINEER WILL PROVIDE AN ��h� �. � ,, �� ` W ELEVATION TO WHICH THE CONTRACTOR WILL �q ►,`` ..i*1•rA� 1W ADJUST/LEVEL THE EXISTING WEIRS TO ACCORDINGLY. e:"��' /� ,/....4.,`,r THE COST SUBMITTED FOR BID ALTERNATE"A"WILL ALSO ' �� ! W INCLUDE REMOVAL AND REPLACEMENT OF ALL EXISTING 0 OP+"xs; Z_ BOLTS,NUTS,AND WASHERS USED TO ATTACH THE WEIRS �� /' / TO THE TROUGHS.NEW BOLT,NUT,AND WASHER 77 ^� 0 MATERIALS TO MATCH EXISTING.SEE DETAIL 2/13M20,AND P �lD®�- ®� /sib 2 Aa / t• -- B Gy :5 �� >�' Q 23.64.OS 3 AND 4 ON 13M20.TOP OF WEIR ELEVATION= D OT SQ PLATFORM p /- p 0-y/ I T I 15. BID ALTERNATE"B"SHALL INCLUDE COSTS FOR �O� �O� REPLACEMENT OF THE EXISTING FIBERGLASS WEIRS(BOTH °' 9� 8'-0"DIA O 9A O SIDES OF TROUGH),AND ALL ASSOCIATED BOLTS,NUTS O INFLUENT WELL 0 AND WASHERS.NEW BOLT,NUT AND WASHER MATERIALS V.'.., 2 (TYP) I y TO MATCH EXISTING.WEIRS DIMENSIONS AND CT! CONFIGURATION SHALL BE PER M216/TYP. I I m I I I I of / 1 I / ` \ SFCONf)ARY([I ARIFIFR NO 1 / \ SFCONDARY(-I ARIFIFR NO 2 / CI \ ©®�® of E ©®�® i� I E v I a I �v I o L I A3 I I I d 6 '1 U F 111'-4"(VERIFY IN FIELD) 111'-4"(VERIFY IN FIELD) F 'o SECONDARY CLARIFIERS 1 AND 2 A SCALE:3/32"=1'-0" FILE:10340A1013M103 m DESIGNED ®„ JOB NO. IF„ G AC oQPWESS/pNq( VEOLIA VERIFY SCALES 1034SA.1S G E NCH ON m DRAWN i;~c��NE ROCmAm � ®C) WWTP CRITICAL IMPROVEMENTS PROJECT ORIGINABAR IS L DE IRAWING DRAWING NO. W CHECKED w x No.77655 oil ��0„� VE O I A MECHANICAL 0 1" 1 3M 1 9 N RJN sT ,. SECONDARY CLARIFIERS 1 AND 2 IF NOT ONE INCH ON1 SHEET NO. DATE *TF OIV\L O�� WATER THIS SHEET,ADJUST REV DATE BY DESCRIPTION OCTOBER 2017 OF CA"� PLAN SCALES ACCORDINGLY 175 OF 317 1 I 2 I 3 I 4 I 5 I 6 I 7 I 8 1 9 1 10 1 11 I 12 1 13 PROJECT NO.10340A.10 FILE NAME: 10340A1013M019.dgn 1 2 3 4 I 5 I 6 I 7 I 8 I 9 I 10 I 11 I 12 I 13 GENERAL NOTES: a 1. SEE STRUCTURAL DRAWINGS FOR CENTER STRUCTURE a MODIFICATIONS. M KEY NOTES:=O# G A 1. TOP OF WALKWAY ELEVATION SHOWN IS APPROXIMATE. A F FINAL ELEVATION TO BE DETERMINED BY CLARIFIER o MANUFACTURER. n 2. DROP/TRANSITION BOX TO BE DESIGNED AND SUPPLIED BY S CLARIFIER MANUFACTURER. 0 3. SCUM SKIMMER ASSEMBLIES.CLARIFIER MANUFACTURER 75 a_ TO DETERMINE SIZE AND METHOD OF SUPPORT. 4. PROVIDE 24"SPOOL PIECE TO EXTEND EX-24"RAS PIPE TO NEW BOTTOM OF CLARIFIER ELEVATION. 5. SUBMERSED INFLUENT(MIXED LIQUOR)PIPE.SIZE, ELEVATION,AND METHOD OF SUPPORT TO BE DETERMINED BY CLARIFIER MANUFACTURER.SEE SECTION 11353A FOR FLOW INFORMATION.COAT PIPE PER SECTION 09960. B B 6. CONNECT TO EXIST DRAIN PIPES WITH(2)45S AND EXTEND PIPES TO TOP OF GROUT IN SUMP.SEE STRUCTURAL t DRAWINGS FOR ADDITIONAL INFORMATION. 7. PROVIDE TRANSITION PIECE BETWEEN NEW CLARIFIER WALKWAY AND EXISTING CONCRETE DECK. MATERIALS TO `v MATCH CLARIFIER WALKWAY. O3 8. SIZE TO BE DETERMINED BY CLARIFIER MFR. TOP OF WALKWAY iO C MAX WS 23.45 C EL 2 EL 9.94 EXISTING TOP OF 1 \ � INFLUENT WELLO9 FLOCULATING WELLOB WEIR EL 23.333 CHANNEL % EL 25.44 I a— — BOTTOM CHANNELOF _ j SUCTION HEADER EL 20.94 TRUSS(TYPE 2) I EXIST 4'-6"x4'-0" � a COVERED CONCRETE O — - I - I F------ „ p MIXED LIQUOR 2 >-----A' p CHANNEL N EL 12.39 I 0 0 0 0 n n 0 n n n n n n n • • • • • • • • . _ _ _ _ _ m (TOP OF GROUT) IF I .) I N eo 1 \ 7 a A n TOP OF 2"GROUT o74 I LAYER EL 12.39 I IMBED y --��oc:1 f INv=a.zs O E INV=4.25 vi ( EX-24"RAS En INV=1.25 0 ti '6 11 Iz C SECTION (TYPICAL FOR SECONDARY CLARIFIERS 1 AND 2) U F 13M19 SCALE:3/16"=1'-0" F FILE:10340A1013M303 I 'o g m DESIGNED VERIFY SCALES JOB NO. rn G RJN oQµ0FES5/O,ygl o.�. I. VEOLIA 10340A.10 G E DRAWN Fe�eHN E"40C Fyc ORIGINAAR IS L DINCH RAWION DRAWING NO. m JDJ �� m ® WWTP CRITICAL IMPROVEMENTS PROJECT °w CHECKED w x( No77655�' ��0„� vE O`I A MECHANICAL 0®1" 13M20 N RJN sT �. SECONDARY CLARIFIERS 1 AND 2 IT THIS S ONEHEE,ADJ S SHEET NO. N DATE 9TF FIVcA`FO�� WATER THIS SHEET ADJUST > C SCALES ACCORDINGLY REV DATE BY DESCRIPTION OCTOBER 2017 � SECTIONS AND DETAILS 176 OF 317 1 I 2 I 3 I 4 I 5 6 I 7 I 8 I 9 I 10 I 11 12 1 13 PROJECT NO.10340A.10 FILE NAME: 10340A1013M020.dgn 1 I 2 I 3 I 4 I 5 I 6 I 7 I 8 I 9 I 10 I 11 I 12 I 13 gh KEY NOTES:=O# 2 Mr a c 1. INSTALL NEW DENSITY CURRENT BAFFLE PER SECTION 11353A. uf°i i O 2. NEW SECONDARY CLARIFIER MECHANISM PER 4.SECTION 11353A. M r-Iii I 3. NEW SCUM SKIMMER ASSEMBLIES.CLARIFIER MANUFACTURER TO N• A DETERMINE METHOD OF SUPPORT. A o Z © 4. NEW SCUM BEACH.CLARIFIER MANUFACTURER TO DETERMINE SIZE �TOC 29.94 I AND METHOD OF SUPPORT. -$ = 5. PROVIDE ALUMINUM STAIRS TO ACCOMMODATE FINAL WALKWAY TOC 25.92 E ELEVATION.CONSTRUCT STAIRS PER DETAIL A235/TYP.NUMBER OF THREADS - - ` 6. TAOD ORFISEELRESV PAETRI WNATLOWBEAYD EETLEERVMATINIOEND. 5 <> E>csi z'1:: .)--.4.\\ \ BY CLARIFIER MANUFACTURER. I \,,, \\\\ 4�7 7. SIZE TO BE DETERMINED BY CLARIFIER MANUFACTURER. .��i 6. CONNECT TO EX 6"SC WITH FERNCO STYLE FLEXIBLE COUPLING. O/ \\ ��. \\NNN 9. PROVIDE TRANSITION PIECE BETWEEN NEW CLARIFIER WALKWAY AND EXISTING CONCRETE STAIRS.MATERIAL TO MATCH CLARIFIER WALKWAY. B i /ilw \\ TO WALKWAYO6 \\ 10. PIPES ARE ENCASED AND LOCATED BELOW BOTTOM OF SLAB. B t I / V I I AV 11. NEW DRAIN PIPE SUMP.SEE STRUCTURAL DRAWINGS FOR ADDITIONAL a / V A I A INFORMATION. // \\\ ( 2"3W ) \\ / 10 EX-24"RAS \ \ I G20 \ 1 \ to / AAA 9� * \ C — C iI ULATINGI A �/� J \'' I III * LW I i �\ �� IIII I ;\ lip 1 — I I ', ki s !/\I D I LA �0 �j'� -- D IN' DENT WELL ��- silI ��.. /�� o � �na PLATFORM te`� ;/ a o iii � © i ' m I \ 9 / d I / I o E \ / E \.. / O o v d \ 0 F I F I 0 g II CBS SECONDARY CLARIFIER 3 I FILE:10340A1013M103 m DESIGNED VERIFY SCALES JOB NO. rn G RJN oQµ0FES5/04 °^'^'. VEOLIA 10340A.10 G E DRAWN ,:eHN E"4oF Fyc AR IS ORIGINAL DINCH ON RAWING DRAWING NO. m JDJ � O. ® WWTP CRITICAL IMPROVEMENTS PROJECT W LS CHECKED 3 x No.77655 N 9 car0„� VEOLIA MECHANICAL 0 1"® 13M21 N RJN sT ,. SECONDARY CLARIFIER 3 IF NOT ONE INCH ON SHEET NO. N DATE 9TF FIVA`�O�? WATER THIS SHEET,ADJUST > C SCALES ACCORDINGLY REV DATE BY DESCRIPTION OCTOBER 2017 � PLAN AND SECTIONS 177 OF 317 1 I 2 I 3 I 4 I 5 6 I 7 I 8 I 9 I 10 I 11 I 12 1 13 PROJECT NO.10340A.10 FILE NAME: 10340A1013M021.dgn 1 2 3 I 4 I 5 I 6 I 7 I 8 I 9 I 10 I 11 I 12 I 13 GENERAL NOTES: a I. SEE STRUCTURAL DRAWINGS FOR CENTER STRUCTURE a MODIFICATIONS. a M ii KEY NOTES:=O 1. TOP OF WALKWAY ELEVATION SHOWN IS APPROXIMATE. N A FINAL ELEVATION TO BE DTERMINED BY CLARIFIER A FL MANUFACTURER. U O 2. SIZE TO BE DETERMINED MY CLARIFIER MANUFACTURER. ti 3. PROVIDE 24"SPOOL PIECE TO EXTEND EX 24"RAS TO NEW p BOTTOM OF CLARIFIER ELEVATION. K— 4. SUBMERGED(MIXED LIQUOR)PIPE.SIZE ELEVATION AND METHOD OF SUPPORTS TO BE DETERMINED AND DESIGNED BY CLARIFIER MANUFACTURER.SEE SECTION 11353A FOR FLOW INFORMATION.COAT PIPE MATERIAL TO BE COAT PIPE PER 09960. 5. DROP/TRANSITION BOX TO BE DESIGNED AND SUPPLIED BY CLARIFIER MANUFACTURER. B 6. NEW SCUM SIMMER ASSEMBLIES CLARIFIER B MANUFACTURER TO DETERMINE METHOD OF SUPPORT. O 7. CONNECT NEW HANDRAIL TO EXISTING.MODIFY EXISTING AS REQUIRED. v 8. CONNECT TO EXIST DRAIN PIPES WITH(2)45S AND EXTEND S"— 0 O TOP OF WALKWAY' PIPES TO BOTTOM OF SUMP.SEE STRUCTURAL DRAWINGS FOR ADDITIONAL INFORMATION. 9. PROVIDE TRANSITION PIECE BETWEEN NEW CLARIFIER WALKWAY AND EXISTING CONCRETE DECK. MATERIALS TO MATCH CLARIFIER WALKWAY. i [AJ TOC EL 29.94 i INFLUENT MAX WS 23.35 EWEIR EL XISTING C - I WELL 2 O (TO REMAIN)0 I I C I`I \\ 1 11 /I EL 25.94 TOP OFI I CHANNEL I— EL EL 24.92 ' i 0 BOTTOM OF % I DENSITYR CHANNEL CURRENT EL 20.7E j SUCTION HEADER BAFFLE L— \\ TRUSS(TYP OF 2) EXIST 4.19'x4'-0" I / `FLOCULATING'2 COVERED CONCRETE WELL MIXED LIQUOR © .0.CHANNEL D �� I ,I; y D mI n I 1t — EL 9.24 • • • • • • • • • • • 1`I'i- — S (TOP OF GROUT) • • • ' _ CT! a � 17 r 1 0 �o — t— ; IT -( EX 6"PD LE.=4.25aI 1" ' \ NI EX-24"RAS o E EC EX.E2"PDQ O TO8P2OF GROUT) N D SECTION a, 13M21 SCALE:3/16"=1-0" FILE:10340A1013M303 r Ti D F F ,1 8 g m DESIGNED ,E"®„ JOB NO. rn G RJN oQµOFESS/ONq, VEOLIA VERIFY SCALES lOWSA.1D G m DRAWND zZ• E 'QOO m12, ® WWTP CRITICAL IMPROVEMENTS PROJECT ORIGINAL DIENWING DRAWING NO.a.. BAR IS ONE NCH ON J (I) W CHECKED w x No.77655�' ��0„� VE O I A MECHANICAL 0®1" 13M22 N RJNlir sT �. SECONDARY CLARIFIER 3 IF NOT ONE INCH ON SHEET NO. N DATE 9TF FIVA` ? WATER THIS SHEET,ADJUST > me'.REV DATE BY DESCRIPTION OCTOBER2017 SECTION AND DETAILS SCALES ACCORDINGLY 178 OF 317 1 I 2 I 3 I 4 I 5 6 I 7 I 8 I 9 I 10 I 11 12 1 13 PROJECT NO.10340A.10 FILE NAME: 10340A1013M022.dgn 1 I 2 I 3 I 4 I 5 I 6 I 7 I 8 I 9 I 10 I 11 I 12 I 13 a KEY NOTES:=0. c 1. CLARIFIER MANUFACTURER TO DETERMINE NUMBER, Hre3, 3/4"SLOT SPACING AND FLOW RATE OF SPRAY NOZZLE INSIDE OF M WIDTH 3/8"x6"FIBERGLASS WEIRS CLARIFIER. N A EL 23.33± 2. CONNECT TO EXIST 2"3W PIPE.PROVIDE ISOLATION VALUE A AT CONNECTION. O FIBERGLASS z ^.. its WASHERS 0 2 23W o o illnir I®N= `■Ur a— i zoM U NUTS AND WASHERS(TYP) NOTE: B SCUM SPRAY THE EXISTING LAUNDER TROUGH WALLS ARE MANUFACTURED B NOZZLE (TYP) o o FROM 1/4"THICK STEEL. t 0 0 2 DETAIL - EXISTING WEIR 13M19 SCALE:11/2"=1'-0" FILE:10340A1013M103 — C C (mil o o }-\\ %%in IQ_ HI • 0 0 ILf/ Imo] 'g':f >_is.:-_'.'_: _{- a o o R0. • 77 •....- 0 -,..."-----------: • . \ - ogi f o 0 o J G -� • :.••' y4_.. ' T a • B M276 M280 �,Y ,� � N ---- - E O TYP TYP o o a ,� t \, (11- a� En .. ` '� )-/28/20161 A" PLATFORM ' '',:,, , 11. .1100r. ". . I , 11 PHOTO - SECONDARY CLARIFIER NO. 1 AND 2 PHOTO - SECONDARY CLARIFIER NO. 1 AND 2 EXISTING TROUGHS AND WEIRS C91 EXISTING TROUGHS AND WEIRS 1,7 SCALE:NO SCALE SCALE:NO SCALE o FILE:10340A1013M023A FILE:10340A1013M023B D F F 1-,-.1 _ 1 DETAIL (TYPICAL FOR 3 SECONDARY CLARIFIERS) 13M19 SCALE:3/16"=1'-0" g FILE:10340A1013M103 m DESIGNED ,E"„ JOB NO. rn G RJN oQµOFESS/0N4, VEOLIA VERIFY SCALES 10340A.10 G E m DRAWN �a�Q�N B. ROcmA m ® WWTP CRITICAL IMPROVEMENTS PROJECT 11GINAN DI=IIT DRAWING NO. dlir W CHECKED w x No.77655.11 car0„� (1) VE O I A MECHANICAL 0®1" 13M23 N RJN sT ,. SECONDARY CLARIFIER IF NOT ONE INCH ON SHEET NO. N DATE *9TF FIVpUFO�� WATER THIS SHEET,ADJUST REV DATE BY DESCRIPTION OCTOBER 2017 ° DETAILS SCALES ACCORDINGLY 179 OF 317 1 I 2 I 3 I 4 I 5 6 I 7 I 8 I 9 I 10 I 11 I 12 1 13 PROJECT NO.10340A.10 FILE NAME: 10340A1013M023.dgn 1 I 2 I 3 I 4 I 5 I 6 I 7 I 8 I 9 I 10 I 11 I 12 I 13 KEY NOTES= O g 1 CONNECT THE NEW CLARIFIER CONTROL PANEL a TO THE EXISTING POWER CONDUITS REMAKE ALL TERMINATIONS.PROVIDE NEW SLT CONDUIT AND PCS CONDUIT FITTINGS ON AS REQUIRED TO MAKE n CONNECTIONS TO THE EXISTING CONDUITS ENTERING THE GALLERY. A 2 EXTEND CONDUITS L-13-701,AS REQUIRED FOR A LIGHTING ABOVE THE GALLERY AND ON THE o P-13-001 CLARIFIERS. Q P-13-002 N P-13-003 3 CONTINUED ON DRAWING 13E13. P-13-004 o P-13-005 4 AND TPROVIHE EMBEDDED PORTIONS ODE NEW PCS CONDUITS BETWEEN THE CONTROL •' P-13-006 �\� d— '5 I AE-1380 L-13-253nCONDUITS FOR CL-1371. P-13-007 \//,P-13-008 /\ L-13-253 5 LOCATED IN THE GALLERY. <5 Y FE-1380 S-13-730 L-13-701 \/ 6 CONTINUE THE CONDUTS OVERHEAD TO THE C 13-731 - AERATION BASIN.SEE DRAWING 13E08. A. ti ti -------------------------------------- .: : :�✓ -=-=-=-=-=-=-=- — — — — — — — — — — — — — — 7 CONTINUE THE INSTRUMENT POWER WIRING : : .. .. .. .. .. . . . . . . : :�:-z:: : :z-:_.. . .. .. .. .. _ _ _ _ _ _ CONTINUED ON - - �� .. ..—..—..—..—..—..—..--._ .._.._.. � •.•._:._:._:._:._:._:._:._:._:._:._: . 'i:_:._:._i:_:•:_:•:_:•:_:•:_:•:_:•:_E_ETE r•._•]]I DWG 00E11 - - ._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.J {-I �-- .._.._. y },� _.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._:._:._:._.._.._.._.._.._.._.._.._.._.._.._.._:._:._q THROUGH PLC-SEC-TR2 AND TO LP-C B 111 i 4 ® II- (,•-�I Il��_.._.._.. .._.._.._.._.._.. LCP-1372 EM901 ._.._.._.._.._.._.._.. B t0 °ITI / I • C-13-721 • LPC/ `�J J L-13-266 \ �J / S-13-266 FIT-1380 5 AERATION CONTROL 1 I L-2-704 / BUILDING 1 Z1 L-2-703 / L-2-702 I I C I C ��<� P-13-710 �:<� P-13-720 a �;�!.�_ �II � ,`,``�`'\\r' �� I C� 4"si'ftikTiZ.I% O.t N. 1"0'NO. % ;;:;:, I, y.,,.� Iw ..1 I �":O 1 Z VI-.11/1111 CD CLR-1371 1 �� .` CLR-1372 lip�j .` F XSHH-1371 � ,, ` ��► XSHH-1372 �� ` I g te...All lk w i 6 \ XSH-1371 ' XSH-1372 r vi ZSC-1371 ` _406. ZSC-1372 ` �.i� m I of I a I 2 E I I E 3 1 I 1 / I Si 1 / 1 / 1 / g, r-\ N.... r-\\N„..„....„,...._ /-1 0 1 \ / / 1 17 D F F 0 8 A PLAN 00E11 SCALE 3/32,1-0" FILE:10340A1013E102 m DESIGNED JOB NO. G CAC �QaoFEssoNq VEOLIA VERIFY SCALES 10340A.10 G E DRAWN FP4'oQ�ER ALq/yC9 Fy - BAR IS ONE INCH ON y �� •U""ref- Iiir ORIGINAL DRAWING DRAWING NO. Carp//'° VE O L I A WWTP CRITICAL IMPROVEMENTS PROJECT m TLM s m °w CHECKED w No.20740 0 ELECTRICAL 0®1" 13E11 N TDH *9T FC'fR\NG / SECONDARY CLARIFIERS 1 AND 2 IF IS SHEE,ADJUS SHEET NO. N DATE F OF AUFOP WATER THIS SHEET ADJUST REV DATE BY DESCRIPTION OCTOBER2017 ° POWER AND CONTROL PLAN SCALES ACCORDINGLY 265 OF 317 1 I 2 I 3 I 4 I 5 I 6 1 7 I 8 I 9 I 10 I 11 I 12 1 13 PROJECT NO.10340A.10 FILE NAME: 10340A1013E011.dgn 1 2 3 I 4 I 5 I 6 I 7 I 8 I 9 I 10 I 11 I 12 I 13 KEY NOTES= O a a 1 THE EXISTING CONDUITS TO THE CLARIFIER MEA ENERUCTE T CLARIFIER CH NISM WALLT.PROVRTHEIDEST AR NEMAUR TYPE AT 4XHE STAINLESS STEEL JUNCTION BOX TO CO INTERCEPT THE EXISTING EMBEDDED CONDUITS.CONNECT ALL EXISTING o AAgh CONDUITS TO THE JUNCTION BOX. A O 2 PROVIDE NEW PCS CONDUITS BETWEEN THE LC R — — — — — — — — CO AND THE ONDUI EMBEDDED PORTIONS OF THE N CONTROL CONDUITS FOR CLR-1371. —'r 3 ROUTE CONDUITS UNDER THE NEW STAIRS ._.._.._.._.._.._.�_.._.._.._..—..--.--.--.— .._.._.._.. '5 TO MAKE THE CONNECTIONS IT THE a— P-13-001 `\ EXISTING EMBEDDED CONDUIT AND TO I P-13-002 — —_�`I REACH THE CLARIFIER MECHANISM. I P-13-003 EM901 LCP-1373 I~�� '� ® `\• 4 PROVIDE NEW PCS CONDUIT BETWEEN THE P-13-004 �� ® _© LCP AND THE JUNCTION BOX AND REINSTALL P-13-005 TYP �\\ \` THE EXISTING POWER WIRING. P-13-006 \�� ©_ P-13-007 /// /O \ I P-13-008 // \ B V. \ _ CONTINUED ON B /12 \ DWG 00E10 m i / / d 1 / \ / \ / \ 1 / \ ......1 C-13-730 —., Illt \ W / �� P-13-730 \ co , a \ 01 I ` �� i � �/ II O I �...eV �mail I I �,�yry�\ I w I ,I�bV 4t 1 z J I r ��::�. I UI I I CLR-1373 .��/ �..�`i�� I I I XSHH-1373 i l''�1,�Q! 1 M1 I\ XSH-1373 '40n� / \ ;;�\/ 1 \ \ / isi I \ / d \ / a \ / "3, > / / N.in N. / o E 1 \\\ //--- E 0 d 6 1.7 D F F A PLAN 00E10 SCALE:3/32"=1-0" FILE:10340A1013E102 'o g m DESIGNED JOB NO. 13, G CAC �QaoFEssoNq VEOLIA VERIFY SCALES 1o34oA.10 G E DRAWN FP4'oQ�ER ALq/yC9 Fy . BAR IS ONE INCH ON y �� •U""ref- ORIGINAL DRAWING DRAWING NO. liglirca/-p//�° VE O I A WWTP CRITICAL IMPROVEMENTS PROJECT m TLM s m °w CHECKED '' No.20740 0 0 1" 13E12 ELECTRICAL N TDH *9T FCTR\CPy�* SECONDARY CLARIFIER 3 IF NOT ONE INCH ON SHEET NO. N DATE F OF AUFOP WATER THIS SHEET,ADJUST REV DATE BY DESCRIPTION OCTOBER2017 ° POWER AND CONTROL PLAN SCALES ACCORDINGLY 266 OF 317 1 I 2 I 3 I 4 I 5 6 I 7 I 8 I 9 I 10 I 11 12 1 13 PROJECT NO.10340A.10 FILE NAME: 10340A1013E012.dgn 1 2 I 3 I 4 I 5 I 6 I 7 I 8 I 9 I 10 I 11 I 12 I 13 KEY NOTES= .0. a 1 LP-13-12 LI WP-GFCI 2 EXTEND CONDUITS L-13-702,L-13-703 ANDU L-13-704 ,b FROM DUCT BANK SECTION B TO THE SOUTH SIDE OF THE CULARIFIERS.RUN THE CONDUITS EXPOSED WHERE POSSIBLE EXTEND L-13-702 TO THE LIGHTS E, A ON THE SOUTH SIDE OF THE CLARIFIERS.CAP-OFF A H CONDUITS L-13-703 AND L-13-704 PER EM105/TYP. U O N 3 CONTINUED ON 13E11. I II CILP-13-7• O LP-13-7• • O • I O 17 O17' Ili. a 1 N 0 1 I tine // \�� /j/ \\ I III / \\ / \ _________dlib N. B iii `/ LJ I B 111 / m III I 1 1 1 III 111 1 1 1 III y III III III III I11 III III III III III \� \� III �.��, �..� I� C III `•�4C� `•�;\ _ C w aok. III �f4�Z.* ��<e� III ��:j� ��:�� _— ICS iii `.�.,;• � 1 .�.,.k 1 O n1 �.. \ Vic.1i,* \ Iw 111 11 A \& �� t� III � 71 in LI �dp,,/,„Ti, ,�. ��I�y� :��`. U III � �.� �� .� 1 Ql� Q III E 17' "O �,�� E 17' 'O �. .� 2 �� D .7:� D 0 a I I I 1 I IS m 1\ 1 1 / oI \ / 1 aI i\\ / \ /I \ / / I oI E I •� // \\ // I I E / / I ----N.� / N C ) r/ N 0 2 1b/ — LP-13-7 LP-13-7, . 17' 1T ti d F 0 D F F A PLAN 00E11 SCALE:3/32"=1-0" FILE:10340A1013E102 m DESIGNED JOB NO. G CAC �QaoFEssoNq VEOLIA VERIFY SCALES 10340A.10 G E DRAWN FP4'oQ�ER ALq/yC9 Fy . BAR IS ONE INCH ON m TLM m "r`f`- ORIGINAL DRAWING DRAWING NO. Iiiiirca/-p//�° VE O I A WWTP CRITICAL IMPROVEMENTS PROJECT CHECKED *�N0.2o74o a* o 1" 13E13 ELECTRICAL N TDH iPT9T FCTI'ne' aP SECONDARY CLARIFIERS 1 AND 2 IF NOT ONE INCH ON SHEET NO. N DATE F OF AUFOP WATER THIS SHEET,ADJUST REV DATE BY DESCRIPTION OCTOBER 2017 ° LIGHTING PLAN SCALES ACCORDINGLY 267 OF 317 1 I 2 I 3 I 4 I 5 I 6 I 7 I 8 I 9 I 10 I 11 I 12 1 13 I PROJECT NO.10340A.10 FILE NAME: 10340A1013E013.dgn 1 2 3 4 I 5 I 6 I 7 I 8 I 9 I 10 I 11 I 12 I 13 KEY NOTES= O d LP-13-12 LLs 1 �WP-GFCI LI s A A H 0 o ii I o p LP-13-7 O 17. a— I _ \ Ir; I //// ›- / \\\ / \ / \ \I / 44j /I �p<�� 1 oI 1 ` I`, -� z1 I - ��f, 1 O I :` cs,� I • I, iizall, I w I I �� 1 I \ / d \ / b. .2 \\ j a \ / n \ / o E I \�\ �� E 0 d 2 1.7 D F F A PLAN 00E10 SCALE:3/32"=1-0" FILE:10340A1013E102 g m DESIGNED JOB NO. G CAC QaoFEssoNq VEOLIA VERIFY SCALES 10340A.10 G E DRAWN e9,,�ER AL,,,,, Fy BAR IS ONE INCH ON y <c W •U""r`f`- ORIGINAL DRAWING DRAWING NO. ca/-p//o° VEOLIA WWTP CRITICAL IMPROVEMENTS PROJECT m TLM m W CHECKED w z No.20740 0 0 1" 13E14 ELECTRICAL N AT *9T FCTR\ se.'. SECONDARY CLARIFIER 3 IF NOT ONE INCH ON SHEET NO. N DATE F OF AUFOP WATER THIS SHEET,ADJUST REV DATE BY DESCRIPTION OCTOBER 2017 ° LIGHTING PLAN SCALES ACCORDINGLY 260 OF 317 1 I 2 I 3 I 4 I 5 I 6 I 7 I 8 I 9 I 10 I 11 I 12 1 13 PROJECT NO.10340A.10 FILE NAME: 10340A1013E014.dgn 1 I 2 I 3 I 4 I 5 I 6 I 7 I 8 I 9 I 10 I 11 I 12 I 13 KEY NOTES= O# g 1 PROVIDE SLEEVES TO THE PUMPS,LEVEL a SWITCHES AND LEVEL TRANSDUCER. 0 gg X-13-501 2 INSTALL JUNCTION BOXES,LCPS AND LIT ON THE n Q C-13-506 SAME EQUIPMENT STAND.INSTALL THE STAND ON P-13-503 THE BASIN WALKWAY. N A P-13-501 A v C-13-505 O S-13-502 N (M105 1.3 • / TYP a— • jj/ CONTINUED ON • ` DWG.00E11 • • • J C-13-504 LCP-1306.2 B B C-13-502 a C-13-503}-� LCP-1308.1 I C-13-501 f=2:, / d \ • 120 H LSLL-1308.1 ILIT-1308.2 C / C 7 \ \ �/ 501> I PMP-1308.2 I PMP-1308.1 —T I LE-1308.2 I I X D I D 6 ,73 IS >3I dl NI o E E U N 0 ti 6 1.7 PLAN U CAD SCALE:3/4"=1-0" F FILE:10340A1013E103 F 'o 'o g m DESIGNED JOB NO. • G CAC �QaoFEssoNq VEOLIA VERIFY SCALES 10340A.10 G E DRAWN FP4'oQ�ER ALq/yC9 Fy - BAR IS ONE INCH ON y �� •U""ref- ORIGINAL DRAWING DRAWING NO. dlirwarp//,,° VE O L I A WWTP CRITICAL IMPROVEMENTS PROJECT D TLM s m CHECKED *°No.20740 a* 0 1" 13E15 ELECTRICAL N TDH i)-ii FCTFOGP'7 SCUM PUMP PIT IF NOT ONE INCH ON SHEET NO. N DATE F OF AUFOP WATER THIS SHEET,ADJUST REV DATE BY DESCRIPTION OCTOBER 2017 ° POWER PLAN SCALES ACCORDINGLY 269 OF 317 1 I 2 I 3 I 4 I 5 6 I 7 I 8 I 9 I 10 I 11 12 1 13 PROJECT NO.10340A.10 FILE NAME: 10340A1013E015.dgn P 1 I 2 I 3 I 4 I 5 I 6 I 7 I 8 I 9 I 10 I 11 I 12 I 13 NUM STATUS ALARM SP ®ETM AIL RUNNING /371\SHEAR PIN (OIL KEY NOTES: ® ® (\ I I 0 FIELD VERIFY EXISTING CLARIFIER I/O POINTS IN PLC SEC-TR2 ACTION STATUS ALARM / TREND AND CONNECT THE NEW CLARIFIER CONTROL PANELS TO THE id (HAD)HOA 1371 FAILED /371\HIGH TORQUE / 11/ APPROPRIATE POINT. 2 1371 (\ I 13\ 0 ENSURE THE EXISTING FUNCTIONALITY AT THE HMI IS ACTION ALARM NUM ®ALARM PRESERVED AND ADD FUNCTIONALITY AS SHOWN. A 0 N A /1371 00 TA(137 ® O3 CONTROL PANEL TO BE LOCATED IN GALLERY STRUCTURE. 1371 1371 1371 z STATUS ALARM SP ALARM c 3 ®REMOTE /CR2\HIGH—HIGH TORQUE/QIH� ti `°A (\1371/ 1371 pp tD a_ Al DI I CURRENT R HIGH—HIGH TORQUE I r 1371 O1 r I 1371 I O1 I U U I n !DI ��DI I AUX1 RUNNING I ICI ISHEAR PIN oo B I I- 1371-0 r —13710 ~�— — —�—�7 B I U 1 U I I DO DI MS 00 �; S�IHIGH TORQUE I ai J II I— 1371 O U I O J II— 1371 nW 2 I I NY I I K I NUM STATUS ALARM SP ©�ETM ©�RUNNING ©�SHEAR PIN ©�� ACTION ALARM ALARM TREND © HOA ©m FAILED ©E HIGH TORQUE 0/11 121 I MEBill C I LL rn ACTION zu ALARM ME HUM mas ALARM C Ai, I�-7,'I ©i 00 ©� ©� ©ER STATUS ALARM SP ALARM ©m REMOTE©iol/I HIGH—HIGH TORQUE ©r� ME _It IJr_--1 HOA E—STOP wAPElk HSD HSU ot w it I ® 1371 1371 op�o I I D c LL CLR MWH 1371 1371 1 To m TSH _J q 1371 AERATION BASIN a TORQUE EFFLUENT CHANNEL ® __J A 13N09 N n ® 13N12 8 TORQUE XSH 0 RAS 1371 E, SHEAR PIN ZSC ___J N • I 1371 E t�_ _ E N I 'I 0 z7 z. Oz m oc, iO zz d o. F F '; r's l' il 2 Nf , �% c SECONDARY CLARIFIER NO.1 g SCUM L.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._. \> CLR-1371 SECONDARY CLARIFIER NO. 1 MI 1HP 480VAC 3PH IZ7 E m DESIGNED ...w� .«�.+M VEOLIA 0340A.JOB .110 G r G CAC QaoFEssi°N a=,.� VERIFY SCALES DRAWN ��P�oQ�P ALq,y 9qeyym �,.e//�% BAR IS ONE INCH ON m MCG ~ s L-C/� (i) VE O I A WWTP CRITICAL IMPROVEMENTS PROJECT ORIGINAL DRAWING DRAWING NO. wCHECKED *�N°'20740 o* caro/%+® INSTRUMENTATION 0®1" 13N 12 N DSR '1-9'FCTR\C'°''P SECONDARY CLARIFIER NO. 1 IF NOT ONE INCH ON SHEET NO. N DATE F OF CAUFOP WATERTHIS SHEET,ADJUST g REV DATE BY DESCRIPTION OCTOBER 2017 P&I D SCALES ACCORDINGLY310 OF 317 1 I 2 I 3 I 4 I 5 I 6 I 7 I 8 I 9 I 10 I 11 12 1 13 PROJECT NO. 10340A.10 FILE NAME: 10340A1013N012.dwg 1 2 3 I 4 I 5 I 6 I 7 I 8 I 9 I 10 I 11 I 12 I 13 NUM STATUS ALARM SP ®ETM AIL RUNNING /372\SHEAR PIN /QI72\ KEY NOTES: ® ® (\ I (\ I 0 FIELD VERIFY EXISTING CLARIFIER I/O POINTS IN PLC SEC-TR2 o. ACTION STATUS ALARM TREND AND CONNECT THE NEW CLARIFIER CONTROL PANELS TO THE .5 /HAD\HOA 13 2 FAILED /372\HIGH TORQUE /IR2\ APPROPRIATE POINT. (\ I (\ I 0 ENSURE THE EXISTING FUNCTIONALITY AT THE HMI IS r. ACTION ALARM NUM ALARM PRESERVED AND ADD FUNCTIONALITY AS SHOWN. N A /HAE\00 /TAH\ II /37272j I O3 CONTROL PANEL TO BE LOCATED IN GALLERY STRUCTURE. A U 1372 1372 1372 1 O STATUS ALARM SP ALARM U 3RI REMOTE /3 Z\I HIGH-HIGH TORQUE/QIN ii \12 2> 0 n 1 I I - - Al I CURRENT R HIGH-HIGH TORQUE I r 1372 O1 r 1372 O1 I U U I n !DI ��DI I AUX1 RUNNING . R,3�ISHEAR PIN oo B I r 1372-'0 r 11372�0 ~�- - -�-�1 B I U I U I I DO IDI MS 00I , Fi THIGH TORQUE ai J I o I U 1372 O r 1372 O1 J W a" I �/ I a _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ t I _ _ _ _ _ _ + - K I NUM STATUS ALARM SP — ©m ETM ©�RUNNING ©�SHEAR PIN ©�� of MEMilE M ACTION ALARM ALARM0E3%1 TREND I © HOA ©m FAILED ©�HIGH TORQUE I� ES NM 1151 1 LL ACTION ALARM NUM ALARM Z w ©ME ©® ©® ,,,E as STATUS ALARM SP eElms ALARM ©m REMOTE©�HIGH-HIGH TORQUE ©rs o U HOA E-STOP w HSD HSU CC w I MEW 1372 1372 I 00 L I I xJ p�o I I I D LL CLR MWH 372 1372 1 d ® -_11 oNEWAERATION BASIN a TORQUE EFFLUENT CHANNEL ® __J A 13N09 n WET 13N13 S TORQUE rn XSH RAS 137 a EAR PIN 1 as& • NI UE k E Z 0 i in Oz oM o zz a— a� oz ZZ_ Z� ti Oo F `o 0 F F o - r c SECONDARY CLARIFIER NO.2 g SCUM L.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._. CLR-1372 SECONDARY CLARIFIER NO. 2 MI 1HP 480VAC 3PH ; 7 E m DESIGNED JOB NO. °� G CAC �QaoFEssioN VERIFY SCALES VEOLIA 1o34oA.10 G DRAWN FP:::ALANc,Fy BAR IS ONE INCH ON m MCG �° 9�m VE O L I A WWTP CRITICAL IMPROVEMENTS PROJECT ORIGINAL DRAWING DRAWING NO. wCHECKED *�N°'20740 a* ��0„�C INSTRUMENTATION 0®1" 13N13 DSR H DATE �T9TF FCTR\C o��P SECONDARY CLARIFIER NO. 2 IF NOT ONE INCH THIS SHEET,ADJUST REVSHEET NO. N OF CALIF WATE R REV DATE BY DESCRIPTION OCTOBER 2017 P&I D SCALES ACCORDINGLY311 OF 317 1 I 2 I 3 I 4 I 5 I 6 I 7 I 8 I 9 I 10 I 11 12 1 13 PROJECT NO. 10340A.10 FILE NAME: 10340A1013N013.dwg 1 2 3 I 4 I 5 I 6 I 7 I 8 I 9 I 10 I 11 I 12 I 13 NUM STATUS / ALARM SP ®ETM AIL RUNNING cR3) SHEAR PIN /Q173\ KEY NOTES: ® ® (\ 0 FIELD VERIFY EXISTING CLARIFIER I/O POINTS IN PLC SEC-TR2 0- ACTION STATUS / ALARM TREND AND CONNECT THE NEW CLARIFIER CONTROL PANELS TO THE /HAD\HOA 1373 FAILED /CR5\HIGH TORQUE /IR\ APPROPRIATE POINT. • (\ M I 0 ENSURE THE EXISTING FUNCTIONALITY AT THE HMI IS r. ACTION ALARM NUM ALARM PRESERVED AND ADD FUNCTIONALITY AS SHOWN. N A /373 00 /373TAH\ II /373 IAH\ O3 CONTROL PANEL TO BE LOCATED IN GALLERY STRUCTURE. A Ica) 1 1373 1 O STATUS ALARM SP ALARM ✓ v C3R3>REMOTE /3R 3\HIGH-HIGH TORQUE/g1H3> 0 > \1 (\ Mir I Al DI I/ I \ICURRENT HIGH-HIGH TORQUE I L 1373 O1 E 1373 O I U U 1 n !DI � DI AUX1 RUNNING I�CRISHEAR PIN 00 B I r—�1373 O1 [ 113730 ~0— — —0-01 B 1 U 1 1 U 1 I DO IDI MS 00 _ I�RS\IHIGH TORQUE d J I o I 1 1 v3 O r 11373 I I . Zia I I I _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ fi _aI K I NUM STATUS ALARM SP — ©m ETM ©�RUNNING © n SHEAR PIN ©�� of ME ME M ACTION ALARM ALARM050h521 TREND I © HOA ©m FAILED ©�HIGH TORQUE NNI ME 1 LL ACTION ALARM NUM ALARM Z w ©ME ©® ©® ©® I�j STATUS ALARM SP ALARM ©m REMOTE©�HIGH-HIGH TORQUE ©r� ies UM HOA E-STOP w HSD HSU w o I V 1373 1373 I a N L f J . - - - - - - - - - - - - - - - - - - - - - - - - - -.J L. — 1 1 _ D o I I I D ' NWI AERATION BASIN o finkI EFFLUENT CHANNEL T. J A 13N09 0 13N14 a— TORQUE _1RAS \ TO RQUE r.._.._.._.•_••_••_•._.•_••_••_.._.._.._.._.._.._..._.._.._.._ 01 Affilik E, NEW SHEAR PIN • aiii. E NOWE (St' � \\ i: red a oz in o zz I /11 �I III 5.— o g la ,,,tt% m`�lal� - ‘1110'-'z z ,,,_ • F / F o •� ••DORY•CLARIFIER ••NO. 3 SCUM •• •• •• •• •• •• •• •• .. .. .. .. .. ..••• •• •i CLR-1373 SECONDARY CLARIFIER NO. 3 /1311 1HP 480VAC 3PH 7; p E m DESIGNED JOB NO. °� G CAC �QaoFEssioN VERIFY SCALES VEOLIA 1o34oA.10 G DRAWN FP49QaEa ALAN�eFy BAR IS ONE INCH ON m MCG �° 9�m VE O I A WWTP CRITICAL IMPROVEMENTS PROJECT ORIGINAL DRAWING DRAWING NO. w CHECKED *�N°'20740 a* ��0„�C INSTRUMENTATION 0®1" 13N14 DATE E �T9TF FCTR,.,*() SECONDARY CLARIFIER NO. 3 1F NOT ONE INCH THIS SHEET,ADJUST REVSHEET NO. N OF CALIF WATER g REV DATE BY DESCRIPTION OCTOBER 2017 P&I D SCALES ACCORDINGLY 312 OF 317 1 I 2 I 3 I 4 I 5 I 6 I 7 I 8 I 9 I 10 I 11 I 12 1 13 PROJECT NO. 10340A.10 FILE NAME: 10340A1013N014.dwg APPENDIX B Resumes :...,„....„.,: ... . : .•. _.. 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'. • , ------•'.. ...- ..fi,-. • .- ••'' • _ , 1-.. ' . -.:.:•_ .:-..71)::. • •„. ..•.,7.1: 14..:..:, .•- --. •.... - ''••••• 7•i- _--- . .: '• '' • . :- .,•••.'-'• '''''... ',.-.'5';-;.'i,5 L.-/I't. .-.-• wrE- ..-••••. ..a.... --2,. ._,„..,• ; -,. ---r- •• .. • - •••.....--, ..„,---- -11111 ....i . A-. . :. .7.!..-s_. :-c:'-,...-- -."......Pt;*.:- •71.!t:,',,,iiir;:f''''• ........•! rp.=•-• ir, ••.•.4.• •••••_ 14.1PA.,.• - _ • 17. ..04A ,-, - - - • , -r., .• '-',.....----'••• ...-Alg 7 -•• .1."-=',.. i -- --,4,-•'.." ' :,' ,::.• • ;-," • _ • , .. 74..- afr-...: ..!4,... •'. •'14: Zw---0'• - • • ' — - ••• -dr.A.." . . , ' .;•r.i.-.'Y';‘:4 - . Michael J. Britten, P. E. 1 Michael Britten is a senior vice president with Carollo Engineers and has 45 years of experience in master planning, design, and construction management of wastewater, water, and storm water facilities. Relevant Project Experience customers that have seen drastic reductions in their water allocations. 4 Project manager for master planning, Education final design,and construction management 4 Principal-in-charge for design of the BS Civil Engineering, services for the Sewer Authority Mid- Turlock Irrigation District,California,1.2-MW Arizona State University, Coastside,California,Wastewater Treatment fuel cell cogeneration system at the City of 1974 Plant.The$17 million project included a 4- Turlock Water Reclamation Plant.The mgd secondary treatment expansion and project involved preparation of grants, Licenses new solids handling facilities. interconnection, permitting applications, Civil Engineer,California Project manager for planning, and prepurchasing equipment. Professional permitting,and design services for the 4 Principal-in-charge for the City of South San Francisco/San Bruno Water Turlock,California,Tertiary Treatment Affiliations Quality Control Plant Improvements.The Facilities design and construction Water Environment $41 million project involved expanding the management.The$50 million project Federation capacity from 9 to 13 mgd average dry included a 20-mgd tertiary treatment American Society of Civil weather flow and providing for wet weather facility, new recycled water pump station, Engineers treatment capacity of 62 mgd. Key elements and six-mile outfall/irrigation pipeline to American Water Works included adding a 110-foot-diameter serve agricultural customers. Association secondary clarifier, RAS pumping system, and bar screen for wet weather flow.and for the City of Burlingame,California, $8 million 4 "Liquid Package" manager for the$1.4 Wastewater Treatment Plant Improvements. billion San Jose Regional Wastewater Facility The project included replacement of the Capital Improvement Program.The liquid aeration system, new blowers,and a sludge stream projects total $360 million in project dewatering building. costs. Major projects include aeration tank rehabilitation, blower rehabilitation,tertiary 4 Principal-in-charge/project manager for filters rehabilitation,secondary clarifier the City of Turlock,California, Nitrification rehabilitation,and a new headworks facility. Facilities Design.The$8.1 million project Responsible for contract management, involved evaluation of alternatives to expand the trickling technical oversight,and mentoring for the filter/activated sludge San Jose engineering staff. process to permit nitrification.The plant will be expanded to 15.5 mgd by constructing 4 Principal-in charge for preliminary and two new aeration basins.The design final design of the City of Turlock,California, converts three existing aeration basins from Headworks and Secondary Treatment floating covers to fine bubble aeration and Capacity Expansion Phase 1.The project adds four new 400-hp centrifugal blowers replaced an outdated headworks and to supply air to the existing aeration basins. expanded the nitrification capacity of the secondary treatment process. 4 Project manager for design of the Union Sanitary District,California, $36 million 4 Principal-in-charge/project manager for Wastewater Treatment Plant Upgrade.The the City of Modesto,California,14.9 mgd project increased plant capacity to 30 mgd Biological Nutrient Removal/Tertiary and included activated sludge processes,an Treatment Facility,which included two 88-foot-diameter anaerobic digester,and parallel membrane bioreactor facilities sludge thickening facilities. Responsible for totaling $150 million.The effluent produced obtaining State Revolving Fund loans, by the facility will be piped to the Delta negotiating with Pacific Gas and Electric to Mendota Canal and utilized by agricultural relocate high voltage lines,and obtaining C car,.■i..s Eng+nears B:\Pursuits\Client84(SAC)\STPUD\SecClarifierRehab\Prop0719\Resumes\BrittenMichael-2pg.docx ...Wn king Wonders W rh Ware,.if Michael J. Britten, P.E. permits from the Bay Area Air Quality 4 Project manager for the City of Stockton, Management District. California, 55-mgd Regional Wastewater 4 Project manager for design of the North Control Facility Capital Improvement and San Mateo County Sanitation District(City Energy Management Plan. Developed a 5 of Daly City),California, $16 million plant year, $150 million capital improvement expansion.The project provides 2.8 MG of program. flow equalization storage basins and new 4 Principal-in-charge/project manager for primary sedimentation basins to expand the the City of Turlock,California, Recycled activated sludge plant from 8 to 10.3 mgd. Water Feasibility Study.The study identified The equalization basins also provide wet potential uses for recycled water, including weather flow storage. groundwater recharge and crop irrigation, 4 Project engineer for design of the East and developed required treatment facilities Bay Municipal Utility District,California, Main for a 20-mgd recycled plant. Wastewater Treatment Plant$5 million 4 Principal-in-charge for the City of waste activated sludge thickening facility Burlingame,California,Wastewater and modifications to the primary sedimen- Treatment Facility Study.The study tation basin influent channels and prechlo- evaluated alternatives for upgrading and rination system. expanding the plant to accommodate wet 4 Project manager for the Central Contra weather flows.The study included a capacity Costa Sanitary District,California, evaluation and a reliability audit of the Comprehensive Wastewater Master Plan, existing facilities. which encompasses a $1.8 billion capital 4 Project manager for the Sewer Authority improvement program for the collection Mid-Coastside(SAM),California,Wet system and wastewater treatment plant. Weather Management Program.The Treatment plant improvements identified project involved monitoring wet weather include replacement of the steam-driven flows and rainfall in Half Moon Bay, El aeration system with a new electric blower Granada,and Montara to evaluate the wet system and revamping of the entire solids weather capacity of the intertie pipeline handling facilities. system.The intertie system conveys Project manager for design and wastewater from these communities to the construction management services for the SAM treatment plant.Carollo prepared a facility plan that identified $8 million in East Bay Municipal Utility District,California, capital improvements,which included wet Wastewater Treatment Plant$24 million weather storage basins, parallel force main, Wet Weather Storage Basin.The project and increased capacity for a major pump included an 11-MG storage basin,120-mgd station. flow diversion facilities,and 80-mgd submersible pump station. 4 Project manager for the City of Fort 4 Project manager for the City of South Bragg,California, $9 million Water Source San Francisco,California,Wet Weather Development Project.The project studied Program,which included an infiltration and the feasibility of installing a new river intake, inflow analysis and development of a capital raw water pumping station, raw water improvement program for the collection transmission pipelines,and 1,500-acre-foot system and main pump stations. reservoir.The project scope also included a recycled water feasibility study.The new 4 Principal-in-charge/project manager for facilities would allow Fort Bragg to eliminate the City of Modesto,California,Wastewater river diversions in the dry season when flows Master Plan for collection system and are low and minimum fish bypass flows treatment/effluent disposal facilities.The cannot be maintained. Pumping would City's 20-year capital improvement plan occur only during the wet season and includes$500 million in improvements. excess flow would be stored in the reservoir to satisfy summer demands. C ca rim■i N Eng+nears B:\Pursuits\Client84(SAC)\STPUD\SecClarifierRehab\Prop0719\Resumes\Britten Michael-2pg.docx ...No king Wonders W rh Wafer Scott E. Parker, P. E ., BCEE Scott Parker, a senior vice president with Carollo Engineers, serves as the firm's Chief Engineer. As Director, he leads the development and updates to all of Carollo's engineering standards, including computer aided design, standard specifications, typical details, and cost estimating. He has completed a wide array of projects in planning, design, and construction of wastewater systems. Education Relevant Project Experience 4 Principal-in-charge/project manager for MS Environmental - Principal-in-charge/project manager for the Fairfield Suisun Sewer District,California, Engineering, University of design and construction of the South Tahoe $22 million Secondary Treatment Expansion, California, Berkeley,1992 Public Utility District,California, $10 million which includes conversion of an Headworks Replacement.Theproject intermediate clarifier, integration of anoxic BS Civil Engineering, P selectors into converted aeration basins, University of California, included new metering,screening,and grit Los Angeles,1991 removal systems,as well as demolition of new secondary clarifiers, new RAS pump existing plant infrastructure to include the station,and odor control. Licenses existing headworks,grit facilities,and an 4 Project manager/engineer for design of Civil Engineer,California abandoned incineration building. the City of Chico,California, $33 million 9- Professional Engineer, 4 Principal-in-charge for the South Tahoe mgd nitrification improvements.The project Hawaii Public Utility District,California,Twin Peaks included headworks modifications, primary Booster Station and Water Line clarifiers,anaerobic digesters and control Professional Replacement.The project included design building,centrifuge dewatering building, Affiliations of a booster station with three 875-gpm chlorine contact basins,sodium California Water vertical turbine pumps,an emergency hypochlorite and sodium bisulfate Environment Association generator,and replacement of 10,000 feet disinfection,48-inch outfall pipe, of 12-inch water transmission pipeline.The administration building,electrical and Water Environment e p instrumentation upgrades,aeration basins, Federation waterline replacement consisted of American Academyof provisions for bidding alternative secondary clarifiers, RAS pumping,aeration construction techniques such as remove blowers,and yard piping.Also responsible Environmental Engineers, for development of the hydraulic model and Board Certified and replace, pipe bursting,and cured-in- place technologies. process calculations. 4 Project engineer for the South Tahoe Discipline engineer for the peak flow, Public Utility District,California, $9 million full-scale hydraulic testing and analysis of Sludge Handling and Odor Control Facilities. the City of Santa Rosa,California, The project involved prepurchase of two Wastewater Treatment Plant secondary centrifuges and design and construction of clarifiers. a dewatering building, liquid sludge storage 4 Peer review for the Inland Empire facilities,cake conveyance and storage, Utilities Agency,California, RP-1 Liquids and remote sludge pumping, polymer addition, Solids Recovery.The project involved design and odor control equipment. for rehabilitation of existing headworks and 4 Principal-in-charge for the City of Chico, primary clarifiers, improvements to yard California, $45 million Water Pollution piping,aeration basin modification,and new Control Plant Expansion to 12 mgd,average fine screens, process blowers,solids thickening facility(using rotary drum day average month capacity. New facilities thickeners),acid phase digesters,odor included headworks,aeration tanks, control systems,and electrical service feed. aeration blowers,secondary clarifier, RAS pump, primary sludge and scum thickening -* Project manager for the Fairfield-Suisun pumps,anaerobic digester and appurtenant Sewer District,California, $11 million Primary facilities,centrifuge,cogeneration unit, Treatment Expansion.This expansion standby generator,sludge storage and increased the primary treatment capacity of processing areas,and constructed wetlands the existing plant by one-third,to an annual for enhancement and effluent polishing. average dry weather flow of 23.7 mgd.The cimp rim MN Eng+nears B:\Pursuits\Client84(SAC)\STPUD\SecClarifierRehab\Prop0719\Resumes\ParkerScott-2pg.docx ..-No king Wonders W rh Waif"! Scott E. Parker, P.E., BCE E project included design of a 95-foot- California, EchoWater Project Flow diameter circular clarifier;vortex grit Equalization Project(FEQ).This$129 million removal basin;related sludge,scum,and project added 110 MG of storage to existing grit pumping stations;grit handling facility; basins to reduce peak flows to 330 mgd and grit basin influent flow channels fitted and provided mass excavation for future with Parshall flumes used for both flow facilities.The project required 1,200,000 CY measurement and flow splitting. of excavation and more than 85,000 truck Principal-in-charge for the Union trips to remove excavated material from the Sanitary District,California, Primary Digester site. FEQ includes two major pumping No.3 Rehabilitation and Solids System stations,concrete lining,washdown system, Capacity Assessment Report. Digester large fill/drain piping,and major effluent improvements included upgrades to the control structures. piping associated with pumped mixing, 4 Project manager for the Sacramento heating,sludge transfer,and digester gas Regional County Sanitation District, systems,as well as concrete repairs and California, EchoWater Project Nitrifying foam insulation replacement to address Sidestream Treatment Project(NST).This structural and safety deficiencies. $50 million project will use nitrifying 4 Principal-in-charge for the Union sequencing batch reactors to reduce Sanitary District, California, High-Speed ammonia in the solids treatment system Aeration Blower Replacement.The project supernatant necessary to meet interim entailed demolition of existing positive permit conditions. It will also produce displacement rotary lobe blowers and nitrate rich effluent for odor control. NST replacement with a high-speed,dual-core includes influent and effluent pumping and turbo blower and associated piping and lime addition.The project was accelerated p p g to save$1.1 million per year in avoided electrical improvements. sodium hypochlorite costs. Principal-in-charge for the Fairfield- 4 Design manager for the Sacramento Suisun Sewer District,California, Blower Replacement,which enhanced the reliability Regional County Sanitation District, and efficiency of the secondary treatment California, EchoWater Project Tertiary process aeration system.The project Treatment Facilities Project(TTF).This$400 involved a secondary treatment process million project will provide filtration and evaluation of the activated sludge process, disinfection of secondary effluent to a level replacement of the 600-hp aeration blowers equivalent to Title 22 requirements for with new high-speed turbo blowers, tertiary disinfected recycled water for aeration piping repairs, standby power unrestricted reuse.TTF includes a 330-mgd generation,and electrical system upgrades. filter influent pump station,217 mgd of granular media filters, backwash 4 Principal-in-charge for the Union equalization and treatment,chemical feed Sanitary District, California,Alvarado systems,covered disinfection contact basin, Wastewater Treatment Plant Solids and a new area control center. System/Capacity Assessment.The plant's 4 Quality assurance/quality control for the influent flows have been steadily decreasing Albuquerque Bernalillo County Water Utility while influent TSS and BOD mass loading Authority, New Mexico,Southside Water rates have been increasing.This project Reclamation Plant Solids Dewatering Facility involved an assessment of existing capacity Replacement.The existing facility did not and ways to increase solids treatment provide reliable service, required significant capacity,optimize solids processes,achieve energy neutrality,and produce Class A maintenance,and was at the end of its biosolids.An evaluation of potential useful life.The project involved preliminary design, Design Analysis Report, permits and regulatory changes was also included. site approvals,detailed design (including 4 Project manager for the Sacramento construction bid documents),and Regional County Sanitation District, engineering services during construction. ca rim MN Eng+nears B:\Pursuits\Client84(SAC)\STPUD\SecClarifierRehab\Prop0719\Resumes\ParkerScott-2pg.docx ...No king Wonders Walt Water if el), Richard L. Gutierrez, P. E. It - - Ricky Gutierrez joined Carollo Engineers in 2001 and has been involved in a broad range of projects, including planning, design, and construction of wastewater i _1;lliu treatment facilities,water treatment facilities, pipelines (including trenchless technology evaluations), river outfalls and diffusers, and pump stations. His experience also includes research and evaluation of disinfection technologies such as UV, pasteurization, and ozone for water reuse projects. Education MS Civil and Relevant Project Experience and efficiency of the secondary treatment Environmental Design engineer and resident engineer process aeration system.The project - Engineering, University of during construction of the City of Chico, consists of a secondary treatment process California, Davis, 2006 California,12-mgd Water Pollution Control evaluation of the activated sludge process, BS Civil Engineering, Plant Expansion.The project expanded the replacement of the existing 600-hp aeration California State plant capacity from 9 mgd to 12 mgd and blowers with new high-speed turbo University, Fresno,2004 involved construction of a new headworks blowers,aeration piping repairs,and facility,grit basins,aeration tanks,secondary electrical system upgrades. Licenses clarifier,digester, modifications to existing 4 Project engineer for the Sacramento Civil Engineer,California pump stations,and various other Regional County Sanitation District, improvements. Responsible for design and California, EchoWater Project$32 million Certification engineering services during construction for Return Activated Sludge Pumping Project 10-Hour Construction aeration tanks,sludge drying beds, (RAS). RAS will replace existing return Safety and Health, hydropneumatic plant water tank, primary activated sludge pumps with new pumps Occupational Safety and effluent pump station modifications, designed to deliver the higher flow and Health Administration, thickened sludge pump station,yard piping, head conditions required by the new California,10/18/2007 and civil site work.Also provided biological nutrient removal process. RAS will Professional construction inspection,submittal review, have a capacity of over 200 mgd and responses to requests for information, includes 48 pumps located at 24 secondary Affiliations coordination of construction progress sedimentation tanks.Carollo completed California Water meetings,field instructions and design preliminary design of the system including Environment Association clarifications,and review of change orders hydraulic modeling, recommendations on Water Environment and as-built drawings. pump selection,an electrical load study that Federation Project engineer for the South Tahoe recommends changes to the existing power American Water Works Public Utility District,California, Process and distribution system,and an instrumentation Association Hydraulic Analysis.The project involved a and control systems review that Hydraulic Institute process and hydraulic evaluation of the recommends changes for improved control Canvassing Committee Wastewater Treatment Plant,focusing on and monitoring.The design also the activated sludge unit process. District incorporated replacement of the coarse staff was interested in determining the near- bubble channel aeration system in the term and possible long-term process needs mixed liquor channels. in order to set appropriate priorities for 4 Engineering services during construction future capital expenditures.Carollo's for the Fairfield-Suisun Sewer District, analysis provided recommendations for California,Secondary Treatment Expansion, meeting current and future peak plant flow which included modifications to several demands and prioritized these capital existing plant pump stations,conversion of improvements.The project also evaluated existing aerobic digesters to aeration tanks, the performance and feasibility of and a new return activated sludge pump alternative treatment configurations station. Responsible for submittal review, intended to optimize plant performance responding to requests for information,and and improve hydraulic capacity. preparing design clarifications. -4 Project manager for the Fairfield-Suisun 4 Project engineer for the Sacramento Sewer District,California, Blower Regional County Sanitation District, Replacement,which enhanced the reliability California, EchoWater Project$50 million c imp pro. 4111 B:\Pursuits\Client84(SAC)\STPUD\SecClarifierRehab\Prop0719\Resumes\GutierrezRichard-2pg.docx Engineers...woriong wonders with water" Richard L. Gutierrez, P.E. Nitrifying Sidestream Treatment Project one year of operating data, review of (NST). NST will use nitrifying sequencing previous engineering studies,site batch reactors to reduce ammonia in the assessments, interview of operators,and solids treatment system supernatant preparation of an assessment report with necessary to meet interim permit recommendations on how to make the conditions. It will also produce nitrate-rich facility operate better and reduce the effluent for odor control. NST includes potential for future odor problems from the influent and effluent pumping and lime plant. Responsible for data review and addition.The project was accelerated to report preparation. save$1.1 million per year in avoided sodium Design engineer for the City of Roseville, hypochlorite costs. California, Pleasant Grove Wastewater 4 Project engineer providing final quality Treatment Plant Phase I Expansion and UV assurance/quality control review for the Design Assist projects.These projects Union Sanitary District,California, High- included expansion of primary and Speed Aeration Blower Project.The project secondary treatment facilities and entailed demolition of existing positive conversion of the disinfection process from displacement rotary lobe blowers and chlorine to UV. Responsible for site work replacement with a high-speed,dual-core design,stormwater calculations, hydraulic turbo blower and associated piping and calculations,and coordination between electrical improvements. discipline engineers. 4 Engineer for the City of Daly City, 4 Resident engineer for the City of Chico, California,Wastewater Treatment Plant California,Water Pollution Control Plant Feasibility Study for Tertiary Treatment Outfall Replacement.The project consisted Expansion.The project evaluated the of construction of an 84-inch diameter feasibility of expanding the tertiary reinforced concrete pipeline,63-inch treatment facilities at the existing diameter HDPE pipe with diffusers installed wastewater treatment plant and included an in the Sacramento River using the float and analysis of several disinfection and filtration sink method,junction structures,and outfall technologies.The technologies evaluated gate structure. Responsible for construction included in-vessel UV systems,ozone inspection,submittal review, responses to disinfection systems,a pasteurization requests for information,construction system,and microfiltration membrane progress meetings, preparation of field systems. Responsible for analysis of instructions/design clarifications,and review disinfection and filtration technologies,site of change orders and as-built drawings. configuration and layout,cost analysis, Resident engineer for the City of development of design alternatives,and Roseville,California, Dry Creek Wastewater report preparation. Treatment Plant Chlorine Conversion to UV 4 Engineer for the performance evaluation Disinfection construction.The project of the Quay Technologies limited low- consisted of construction of a 45-mgd UV pressure, high-output microwave generated disinfection system capable of producing UV system in Roseville,California.Testing disinfected tertiary recycled water in was conducted in accordance with the accordance with Title 22,construction of an National Water Research Institute/Water onsite sodium hypochlorite generation Research Foundation UV guidelines to system to provide chlorine residual to the receive conditional acceptance by California recycled water distribution system,and Department of Public Health to be used for conversion of existing chlorine contact Title 22 water recycling applications. basins to recycled water storage tanks. 4 Engineer for the Rancho Murieta Responsible for submittal review, Community Services District,California, responding to requests for information, Wastewater Treatment Plant Operational preparing field instructions and design Audit.The project consisted of a review of clarifications, reviewing as built drawings, and construction inspection. C Car''tr'll B:\Pursuits\Client84(SAC)\STPUD\SecClarifierRehab\Prop0719\Resumes\GutierrezRichard-2pg.docx Engineers...woriong wonders with water" x• Edward A. Wicklein, P. E . Edward A. Wicklein has 21 years of experience in design and analysis of hydraulic facilities using numerical models. He has experience in all phases of modeling including code development, grid generation, flow analysis, and data visualization. He 7 { has conducted many computational fluid dynamic (CFD) studies of municipal and industrial water facilities.These projects have included pump intake modeling, reservoir modeling, raw water intake design and analysis, outfall design and analysis, Education modeling of junctions and flow splits, and detailed modeling of most of the major MS Civil Engineering, water and wastewater treatment components and processes. Hydraulics,Washington engineerresponsible for State University, 2000 Relevant Project Experience Project BS Civil Engineering, 4 Project engineer for the South Tahoe developing CFD models of secondary Washington State Public Utility District,California, Headworks sedimentation distribution channel and University,1998 Replacement.Assisted on a study to basins for the West County Sewer District, develop the preliminary hydraulic layout of California. Four rectangular secondary Licenses a portion of the new headworks.CFD clarifiers were supplied by two aeration Civil Engineer, modeling was used to optimize flow split basins via a rectangular channel, in a Washington,California, and velocity distribution in the channels symmetrical arrangement.Conducted Florida between headworks screens,through vortex modeling to find gate settings that balanced grit tanks,to Parshall flumes leading to flow between the clarifiers and to determine Professional primary clarifiers. the capacity of the two clarifier designs. Affiliations 4 Project engineer responsible for 4 Project engineer for the Dallas Water Water Environment Utilities,Texas,Central Wastewater developing a CFD model of a flow splitting Federation Treatment Plant Improvements. Evaluated structure for City of Daly City,California, American Water Works inlet improvements for a 195-foot-diameter Wastewater Treatment Plant. Flow from the Association secondary clarifier. Modeling incorporated a aeration basins is combined in a well-up International Water custom density-coupled sedimentation box,then divided between three secondary Association model.A new target baffle design was clarifiers via weirs.A 3D free surface CFD developed with the model that better model was used to ensure the geometry of Hydraulic Institute p the inflow piping did not lead to non- dissipated inlet energy and improved sedimentation in the large tanks. uniform flow split between the clarifiers. Project engineer for the West County - Project engineer for development and Sewer District,California, Secondary Clarifier analysis of a flow splitting structure CFD Improvements. Facility planning determined model as part of a wet weather treatment that two of the clarifiers should have capacity upgrade for the Central Marin additional capacity.A custom solids Sanitation Agency,California.The project transport model was used with the involved expanding treatment capacity by commercial CFD model to evaluate inlet adding treatment facilities.The existing flow baffle improvements to increase the distribution structure is symmetrical.Work sedimentation capacity of the existing tanks. included adding two clarifiers on one side, connected by an extension channel.At the 4 Project engineer for CFD modeling of proposed peak wet weather flow,the split Vallejo Sanitation and Flood Control District, between the clarifiers will be adjusted with California, Secondary Clarifiers.The District gates at the clarifier entrances.The CFD was considering potential inlet energy model provided a basis for estimating the dissipation improvements.The CFD model, range of gate openings required to balance along with a custom sedimentation model, the flow between the clarifiers. was used to evaluate performance improvements for a range of commercially Project engineer responsible for CFD available products,as well as some simple modeling for the City of Loveland, modifications. Colorado,secondary clarifiers.The City currently has three secondary center-feed clarifiers. Peak flows are projected to C Caprom. 11'11 B:\Pursuits\Client84(SAC)\STPUD\SecClarifierRehab\Prop0719\Resumes\WickleinEdward-2pg.docx Engineers...woriong wonders with water" Edward A. Wicklein, P.E. increase 20 percent in the coming years. Seoul, South Korea.The rectangular CFD modeling showed that the projected secondary clarifiers were highly loaded and flow increase would likely lead to failure of utilized lamella plates to aid in the clarifiers as they were configured.The sedimentation.The model was also used to model was used to develop an improved evaluate the impact of baffling on inlet energy dissipation system that sedimentation. provided increased capacity within the 4 Project engineer responsible for CFD existing tanks,thereby delaying the need for an additional tank. modeling of wet weather treatment headworks for the San Francisco Public 4 Project engineer responsible for Utilities Commission,California.The CFD developing CFD models of the secondary model was used to evaluate bar screen clarifier flow splitting structure and channel alternative configurations that secondary clarifiers for the City of Glendale, would work in the available space. Modeling Arizona,Arrowhead Wastewater Treatment was also performed to optimize the Plant.The flow splitting structure had an configuration of the channels approaching asymmetric weir arrangement, leading to the vortex grit tanks and provide balanced unbalanced clarifier flows.The model was and uniform flow conditions. used to find weir settings that would lead to Project engineer responsible for CFD balanced flows at peak conditions.The plant modeling of the Plant 1 headworks for the has two styles of rectangular clarifiers.The Orange County Sanitation District, newer ones have higher effluent suspended California.Two models were developed,one solids than the original set.CFD modeling of the pump station and one of the grit was used to find the cause of the difference tanks.The pump station model was used to and develop baffling improvements to investigate options to increase the peak improve sedimentation in the newer flow from 280 mgd to 320 mgd reusing as clarifiers. much of the existing wet pit/dry pit 4 Project engineer responsible for infrastructure as practical.A model was also developing a CFD model of the Secondary develop of the existing aerated grit tanks to Clarifiers at the City of Longmont,Colorado, evaluate options to similarly increase Wastewater Treatment Plant.The model capacity,as well as generally increase was used to develop improvements to performance.The model included grit increase the capacity of the existing clarifier, particle tracking bases on field grit allowing the City to postpone construction measurements to quantify performance and of a second clarifier. compare geometric changes. 4 Project engineer responsible for 4 Project engineer responsible for CFD developing a CFD model of a secondary modeling of the open channel UV system clarifier flow splitter structure for the City of hydraulics for the City of Lodi,California. Everett,Washington.The city currently has The existing UV equipment was due for a two secondary clarifiers. Flow is split complete lamp replacement.The study between them in a structure designed to evaluated the potential for equipment supply up to four clarifiers.A third clarifier is upgrade,as well as evaluated the current being added,which will create a non- system hydraulics to determine if minor symmetrical arrangement.A free-surface improvements to the facility configuration CFD model was used to evaluate weir could improve system efficiently.The model settings and other improvements to create showed that the high headloss flow balanced flow at a range of conditions. distribution baffle did not do a very good Project engineer responsible for job of creating uniform flow conditions at developing and implementing a density the first lamp bank,and instead a lower coupled sedimentation model to estimate head loss baffle and turning vanes would the performance of proposed clarifiers for provide better hydraulics for the UV system. the Seonam Water Reclamation Plant in C Car''tr'll B:\Pursuits\Client84(SAC)\STPUD\SecClarifierRehab\Prop0719\Resumes\WickleinEdward-2pg.docx Engineers...workng wonders with water" P Mike E. Dadik, P. E., S. F. Mike Dadik has 28 years of experience in structural design of water,wastewater, and civil engineering projects. He has overseen the structural design of numerous projects ranging from water and wastewater treatment plant construction and expansion to pump station seismic retrofits. Mike has extensive experience in rehabilitation and seismic vulnerability assessments. He has extensive experience in coating and corrosion control and is Carollo's coating specialist responsible for maintenance of Education our coatings and finishes specifications. BS Civil Engineering, station, biofilter,aeration basin retrofits,two Arizona State University, Relevant Project Experience 1996 4 Structural engineer for the South Tahoe secondary clarifiers, new RAS pump station, Public Utility District,California, $9 million and odor control. Licenses Sludge Handling and Odor Control Facilities. 4 Structural engineer for preliminary and Civil Engineer,California The new 7,400-square-foot masonry final design of the City of San Leandro, Structural Engineer, building houses new centrifuges and sludge California,Water Pollution Control Plant California, Nevada, handling equipment,and a new steel tank Rehabilitation to restore the plant to its Hawaii was constructed for sludge storage. permitted capacity of 7.6 mgd with various Civil/Structural Engineer, Structural engineer for the South Tahoe facility improvements and addition of new - Washington, Oregon Public Utility District,California, $10 million facilities. Major work included construction Headworks Replacement.The project of a new headworks and influent pump Professional consists of new metering,screening,and station,circular primary clarifier, primary Affiliations grit removal systems in a new two-story, effluent flow equalization facilities,and American Society of Civil 4,500-square-foot,cast-in-place concrete covered,fixed film reactor with associated Engineers and masonry building. Innovative lift station and biofilter facility. Chi Epsilon (National Civil approaches were utilized to mitigate the 4 Project manager for the Primary Clarifier Engineering Honor corrosive environment and maintain Inspection for Delta Diablo Sanitation Society) separation between building classification District,California.The project included Engineers Without occupancies. visual inspection of the plant's primary Borders,Technical 4 Structural engineer for preliminary and clarifier concrete slab and walkway and Advisory Committee final design of the City of Turlock,California, recommendations for repair. Structural Engineers Headworks and Secondary Treatment 4 Structural engineer for the Delta Diablo Association of Northern Capacity Expansion Phase 1.The expansion Sanitation District,California, Primary California replaced an outdated headworks and pump Clarifier Improvements. Responsible for Tau Beta Pi (National station and provided additional influent design of concrete and coating repair of the Engineering Honor pumping capacity to handle future flows. clarifiers and primary sludge pump station. Society) 4 Structural engineer for assessment and - Structural engineer for preliminary and NACE International preliminary/final design of the Union final design of the Fairfield-Suisun Sewer Society for Protective Sanitary District,California, Primary Clarifier District,California, $11 million Primary Coatings, Northern Rehabilitation.The project involved concrete Treatment Expansion.Work involved design California Chapter repair,seismic upgrades,and replacement of a new circular primary clarifier,vortex grit Steering Committee of four primary clarifier mechanisms,which basin, primary sludge and scum pump Governor's Office of are housed in a 14,400-square-foot facility. stations, biofilter,and electrical building. Emergency Services, Two clarifiers had to remain in service ATC-20 Trained 4 Structural engineer for the City of Responder during construction,which complicated Modesto,California, new$120 million Phase construction sequencing and cost estimating. 2 Biological Nutrient Removal/Tertiary Treatment Facility.The project involved 4 Structural engineer for preliminary and preliminary and final design of new 12.6- final design of the Fairfield-Suisun Sewer mgd aeration basins and membrane District,California, $22 million Secondary bioreactors(MBR),enclosed UV disinfection Treatment Expansion,which involved design system, large bridge crane structure,and of an intermediate clarifier, influent pump masonry buildings.Site preparation c car''■i..s Eng+nears B:\Pursuits\Client84(SAC)\STPUD\SecClarifierRehab\Prop0719\Resumes\DadikMike-2pg.docx ...No king Wonders W rh War x Mike E. Dadik, P.E., S.E. required mitigation of soft soils including coatings over damaged concrete surfaces. soil modification and development of cost- Unique aspects of this fast-track project effective, below-grade piping connections. included detailed construction sequencing Was structural engineer of record leading a and bypass pumping planning to enable team of five structural design engineers. rehabilitation of the pipeline and channels Designed the aeration basins and MBR while maintaining reliable plant operations. structures. 4 Structural engineer for design and 4 Structural engineer for the City of construction of the California Department of Modesto,California, $20 million Phase 1A Corrections and Rehabilitation $35 million Treatment Plant Expansion.The project Deuel Vocational Institution new wastewater involved design of a new 1.2-mgd oxidation treatment plant.The new membrane ditch and membrane bioreactors, UV bioreactor facility had below-grade cast-in- disinfection system, bridge crane structure, place concrete tanks and above-grade and several masonry buildings. masonry and steel buildings.Challenges - Structural engineer for the San Francisco included extensive site work to raise the Public Utilities Commission,California, buildings above the flood level and mitigate Southeast Plant SEP 020 Headworks.The uplift potential for below grade tanks. new headworks will improve the treatment 4 Structural engineer for the City of San efficiency of screening and grit removal, Jose,California,San Jose/Santa Clara Water while maximizing the control of odors.The Pollution Control Plant Headworks 250-mgd replacement headworks includes Condition Assessment.The project involved influent diversion, bar screens,screenings a detailed condition assessment of the handling,grit basins and handling, primary original influent pumping,screening,and flow splitting,odor control scrubbers,and pretreatment facilities by a multidisciplinary an electrical building. team (structural, mechanical, process, Structural engineer for the City of electrical,and instrumentation). Input from Woodland,California,Aeration Retrofit.The the condition assessment was used to City's wastewater treatment plant is rated estimate replacement costs and timing for for 10.4 mgd, but has insufficient aeration keeping the original headworks in use until capacity for the rated flow. In addition,the 2040. Efforts tied into a parallel analysis on plant is expected to have nitrate limits in the the costs and timing for expanding the new future;therefore, process modifications are headworks facilities if the City chose to needed. Designed improvements to decommission the original headworks. increase aeration capacity and convert the 4 Structural engineer for the Delta Diablo oxidation ditch process to a Modified Sanitation District,California,Secondary Ludzack-Ettinger(MLE)configuration. Solids Thickening Design,which involves Improvements included replacing brush evaluation and design of a new 2-meter rotors in the oxidation ditch with more gravity belt thickener to be located within energy efficient diffused air and fine bubble the plant's existing abandoned DAF Tank aeration and partitioning the oxidation ditch No.3.A new open canopy structure is and adding necessary mixers and internal provided to house the existing and new pumping to convert to the MLE process, gravity belt thickeners. which will further reduce energy demands. Project manager for the City of Palo 4 Project manager/structural engineer for Alto,California, Regional Water Quality the Delta Diablo Sanitation District, Control Plant Repair and Retrofit.The California, Primary Influent Pipeline and Grit project involved design to rehabilitate aging Chambers Repairs.The project involved plant facilities through two construction rehabilitation of 140 feet of 42-inch primary projects,assessment of the structural influent piping using the CIPP method, integrity of the foundations of the repair of damaged concrete at the aerated operations and solids incineration buildings, grit chambers,and application of protective and additional minor facility assessments. cimp rim MN Eng+nears B:\Pursuits\Client84(SAC)\STPUD\SecClarifierRehab\Prop0719\Resumes\DadikMike-2pg.docx ...No king Wonders W rh Waif"! „ir,„„,,, Daniel S. Robinson, P. E. Daniel Robinson has 20 years of electrical and control systems experience in the water and wastewater industry. He is proficient in 480VAC electrical distribution systems;variable frequency drives (VFDs), reduced voltage soft starter(RVSS), and full-voltage (FV) motor control design; supervisory control and data acquisition (SCADA), programmable logic controller(PLC) and industrial control panel design; control system architecture; serial, Ethernet, and radio communication; process Education instrumentation;water/wastewater treatment processes; project management; UL, BS Mechanical NEC, NEMA, and NFPA 70E requirements; and relay and ladder logic. Daniel's primary Engineering Technology, responsibilities have included design of switchgear, motor control centers (MCCs), California State PLC panels, and instrumentation, control, and communication systems; creation of University, Sacramento, interconnection diagrams for power and control wiring between project equipment; 2000 creations of input/output (I/O) lists, loop diagrams, training documents, and factory and field test documentation; and development of control system descriptions, and Licenses operations and maintenance (O&M) manuals. Electrical Engineer, California Relevant Project Experience SCADA system;field instrumentation with - Electrical/instrumentation and controls flow, level, pressure,dissolved oxygen, manager for the City of Hughson,California, oxidation reduction potential,and Wastewater Treatment Plant Expansion, hazardous gas monitoring;coordination of which included main lift station, headworks, intrinsically safe requirements;and power, oxidation ditch,and secondary clarifier.The control,and communication project also included a 480V utility metering interconnection diagrams,testing,training, switchboard with automatic transfer switch, and final documentation. surge protective device,and power monitor; 4 Instrumentation and controls engineer MCCs with VFDs,active harmonic filter, for the Sacramento Regional County RVSS,and reversing and non-reversing Sanitation District,California, EchoWater starters;control panels with Allen-Bradley Project Return Activated Sludge Pumping ControlLogix PLCs, Ethernet,fiber optic,and Project(RAS).This$32 million project will radio communications to a new SCADA replace existing return activated sludge system;field instrumentation with flow, level, pumps with new pumps designed to deliver pressure,dissolved oxygen,and total higher flow and head conditions required suspended solids monitoring;coordination by the new biological nutrient removal of intrinsically safe requirements;and loop process.The RAS pumping system has a diagrams,uninterruptible power supply load capacity greater than 200 mgd and includes calculations,testing,and training. 48 pumps located at 24 secondary 4 Electrical/instrumentation and controls sedimentation tanks. Preliminary design manager for the City of Reno, Nevada, included hydraulic modeling, pump Reno/Stead Water Reclamation Facility selection recommendations,electrical load Expansion,which included headworks, study that recommended changes to the oxidation ditch,aeration basin,secondary existing power distribution system,and clarifier,tertiary filters,chlorine contact instrumentation and control systems review basin,and effluent structure.The project that recommended changes for improved also included 15KV main switchgear, 5KV control and monitoring. switchgear with automatic transfer switch 4 Electrical/instrumentation engineer for and power distribution,480V power design and engineering services during distribution with surge protective device and construction for the City of San Mateo, power monitors; MCCs with 18-pulse VFDs, California,Wastewater Treatment Plant 6-pulse VFDs,and non-reversing starters Process Control System Upgrade and with electronic overload and smart relay Collection System SCADA Integration.The controls;control panels with Modicon project involved replacement of most of Quantum PLCs and Modicon HMI; MB+ PLC control panels in the plant with an fiber optic ring communications to a new C Ca r''iftpil B:\Pursuits\Client84(SAC)\STPUD\SecClarifierRehab\Prop0719\Resumes\RobinsonDaniel-2pg.docx Engineers...woriong wonders with water” Daniel S. Robinson, P.E. Allen-Bradley ControlLogix PLC system, tank control panel and turnout control replacement of the SCADA system with a panel.The tank control panel has a solar new SCADA system that includes remote load controller, battery controller,120VAC view nodes located in all of the major inverter,and solar array meeting NEC 690 process areas of the plant,and installation requirements.The turnout control panel has of a fiber optic backbone communication controls for a pressure control valve with network extending the PLC network,SCADA flow calculation capabilities and a PLC with network,and business network throughout leased line modem communications;motor the entire plant. Installation of the control controls for an irrigation pump and power system was done in phases with complex distribution for the cathodic protection sequencing to reduce facility downtime and system;control panels with Allen-Bradley ongoing City and contractor coordination. ControlLogix PLCs and Allen-Bradley HMI; 4 Electrical/instrumentation and controls radio and CSU/DSU communications with manager/supervisor for the National Park modifications to the existing SCADA system; Service El Portal Wastewater Treatment solar, battery,uninterruptible power supply, Plant Upgrade in Yosemite National Park, and inverter load and runtime,seismic,and California.The project involved design wind load calculations;and power,control, services,construction,and field installation and communication interconnection to rebuild the main control and filter control diagrams,testing,and training. panels,fiber optic communications,and a 4 Electrical/instrumentation and controls new SCADA system.Tasks included field manager/supervisor for the City of West investigations,design proposals,and cost Sacramento,California, Lift Stations estimates;coordination meetings to Upgrade,which involved rehabilitation of 11 facilitate detailed design documentation sewer lift stations and installation of a new including field installation of components SCADA system.The project included 480V into existing enclosures, PLC I/O and control and 240V utility switchboards with interface schematics,and communication automatic transfer switch,surge protective and conduit routing diagrams;construction device,and power monitors; MCCs with of new control,communication,and SCADA VFDs and RVSS motor controls;control systems;coordination of shutdown and panels with TESCO L2000 PLCs and Ethernet cutover procedures,field installation,and radio communications to a new RSView startup;and testing and training. SCADA system;field instrumentation 4 Electrical/instrumentation engineer for including flow, level, pressure,02 and H2S Clean Water Services, Rock Creek Advanced gas monitoring;coordination of intrinsically Wastewater Treatment Facility Gravity safe requirements;and power,control,and Thickeners.The project involved communication interconnection diagrams, constructing four new gravity thickeners in testing,training,and final documentation. an operating plant and included a major 4 Electrical/instrumentation engineer for 480V ductbank relocation;addition of MCC the City of Martinez,California, Electrical sections for VFD and FV motor controls, Power Distribution Upgrades.The project addition of a control panel with an Allen- involved replacement of major electrical Bradley ControlLogix PLC and integration distribution equipment, including PG&E into the plant SCADA,and instrumentation main service transformer and associated for flow, level, pressure,and temperature. service conductors on the transformer The project also included modifications to secondary, main switchboard,four in-plant solids processes and systems with complex MCCs,100-kVA transformer,and feeder sequencing of installation and startup so as conductors and conduit between the main not to interrupt treatment plant operations. switchboard and downstream MCCs and 4 Electrical/instrumentation and controls equipment.The project also included manager for the Placer County Water implementation of a load-shedding scheme Agency,California, Bella Tuscany Pipeline and complex sequencing to reduce facility and Tank,which included a solar powered downtime and ongoing. C Car''tr'll B:\Pursuits\Client84(SAC)\STPUD\SecClarifierRehab\Prop0719\Resumes\RobinsonDaniel-2pg.docx Engineers...workng wonders with water" r. Eric T. McGrath, P. E. 'w - Eric McGrath is a civil engineer with more than 32 years of experience that includes management of construction plan and specification development for a variety of water and wastewater civil engineering projects. Relevant Project Experience level cost estimates for wastewater Project manager for the Washoe collection system improvement projects. Education County, Nevada,Collection System Flow 4 Quality manager for the Barrick Gold BS Civil Engineering, Monitoring, Hydraulic Modeling,and Corporation's Cortez Hills Water University of Utah,1987 Arsenic Identification Plan. Responsible for Management Plan Delivery and Disposal coordinating project execution and Detailed Design in Elko, Nevada. Licenses subconsultant activities for flow and water Responsible for construction plan and Civil Engineer,California, quality investigation of the South Truckee specification review for pump station and Nevada Meadows Water Reclamation Facility and conveyance pipeline design. Spanish Springs service areas.A detailed analysis of storm impacts, infiltration,and Quality manager for the Barrick Gold inflow in the identified services areas was Corporation's Water Management Portfolio necessary to address current flow and water Studies in Elko, Nevada. Responsible for quality issues and to ensure adequate review of pump station and conveyance conveyance capacity is available as new pipeline design concepts. growth occurs in Washoe County. 4 Design manager/construction manager 4 Project engineer for the City of Riverside, for the Poggemeyer Design Group, Inc. in California,Comprehensive Wastewater Reno, Nevada,from 2009-2016.Served as Master Plan Update.The update involved design manager for Poggemeyer Design flow monitoring,flow and process Group(planning/design parent firm)and modeling,condition assessment,Waste construction manager for its subsidiary Discharge Requirements GAP Analysis,and construction management group, development of a capital improvement plan CMWorks. Responsibilities primarily for the collection system. Developed flow included management of construction plan allocations for computer modeling flow and specification development for a variety simulations. of civil engineering project types.Also served as water/wastewater planning and 4 Project engineer for the Contra Costa design lead for the western U.S. Region. Water District,California,Treated Water Representative projects include: Renewal and Replacement Study Update • Apex Wastewater Collection System, Asset Management Plan. Developed planning level cost estimates for water City of North Las Vegas, Nevada. system improvement projects. • San Clemente Island Wastewater 4 Project manager for the City of Millbrae, Treatment Plant and Recycled Water California, Madrone Pump Station System, U.S. Navy,California. Rehabilitation and Preliminary Design. • Paradise Hills Pressure Zone 4 Project manager for the County of Conversion,City of Henderson, Nevada. Washoe, Nevada, Pleasant Valley • Weber Dam Modifications Phases 2 Interceptor 3 Predesign.Coordinated and 3, Bureau of Indian Affairs/Walker project execution and subconsultant River Paiute Tribe, Nevada. activities for preliminary design and 30- percent cost estimates for two alternatives While with the Poggemeyer Design recommended in the alternatives study. Group,served as Profit Center Managing Leader co-leading with the Profit Center 4 Staff engineer for the Central Contra Practice Leader an engineering group of 29 Costa Sanitary District,California,Collection employees. Primary responsibility was System Master Plan. Developed planning financial performance of the engineering C car,.■i..s Eng+nears B:\Pursuits\Client84(SAC)\STPUD\SecClarifierRehab\Prop0719\Resumes\McGrathEric-2pg.docx ..-No king Wonders W rh Waif"! Eric T. McGrath, P.E. design group, including managing budgets, duties and business development activities. monitoring work in progress,optimizing Representative projects include: labor utilization,and other responsibilities to • Susanville Wastewater Treatment ensure profitability.Additional Plant Expansion, Susanville Consolidated responsibilities included business development of water and wastewater Sanitary District,California. clients and project management of water • Cold Springs Wastewater Treatment and wastewater projects. Representative Plant Facility Planning,Washoe County projects include: Department of Water Resources, • Export Sewer Pump Station Master Nevada. Plan, North Tahoe Public Utility District, • Ely Wastewater Treatment Plant California. Expansion,City of Ely, Nevada. • Recycled Water Facilities Master Plan, 4 Supervisor for the City of Los Angeles South Tahoe Public Utility District, Department of Water and Power from 1987- California. 1995. For the first two,years served as a North Virginia Sanitary Sewer construction inspector on large water •Interceptor Phase 1,City of Reno system projects. For the second two years, Department of Public Works, Nevada. served as project engineer performing civil and structural engineering design. For the 4 Branch manager for AMEC final four years,supervised an engineering Infrastructure, Inc.in Reno, Nevada from design group consisting of two engineers, 2003-2005. Managed the Reno office,which two surveyors,and a drafter. Representative included approximately 15 people. projects include: Responsible for all office objectives and • Bishop Fuel Facility for fleet vehicles. operations, including profitability, business development, personnel management,and • Haiwee Reservoir Improvements, project execution. Representative projects which included modifications necessary include: for reduced maximum storage level. • North Spanish Springs Floodplain • Los Angeles Reservoir Pump Station, Detention Facility,Washoe County which was a large 200-cfs pump station. Department of Water Resources, • Maclay Tanks,which were twin 10- Nevada. million-gallon pre-stressed concrete • High Desert State Prison Wastewater tanks. Treatment Plant Improvements, Nevada State Public Works Board, Nevada. • Water Treatment Plant Study, Kingsbury General Improvement District, Nevada. • Reclaimed Water System Improvements,City of Sparks, Nevada. --> Project manager for Kennedy/Jenks Consultants in Reno, Nevada from 1995- 2003. Hired as a project engineer and was soon promoted to project manager. Managed multi-engineering discipline projects primarily in municipal water and wastewater.Assisted in office management C car,.■i..s Eng+nears B:\Pursuits\Client84(SAC)\STPUD\SecClarifierRehab\Prop0719\Resumes\McGrathEric-2pg.docx ...No king Wonders W rh Waif"! KEVIN A. HEENEY, PLS Vice President California Licensed Land Surveyor, P.L.S. 5914 For 43 years, Kevin has been involved with various aspects of the surveying and mapping profession. He has been licensed since 1988 and practicing in the Greater Sacramento region. Previous work experience has provided him the opportunity to successfully complete surveying and mapping projects throughout the State of California. As a Principal Surveyor, Kevin draws on this experience, his knowledge of technologies and his project management skills to ensure that projects are successfully completed, on time and on budget. KEY PROJECTS EXPERIENCE PUBLIC WORKS/WATER-WASTEWATER • SPA Recycled Water Project, SRCSD • EchoWater Project, SRCSD • San Mateo WWTP 20 Year Master Plan • California Men's Colony UV Disinfection Design Project • Lower Northwest Interceptor: 17.1 mile sewer interceptor and structures; mapping, right of ways, monitoring and construction layout. • South Interceptor-Mather Interceptor: 11 mile sewer interceptor; topographic mapping and right of ways • Deuel Vocational Institute: Wastewater Treatment Plant Modifications; mapping and Due Diligence documents • Sacramento River/Fairbairn Wastewater Treatment Plants: Rehabilitation projects; topographic mapping PUBLIC WORKS/LEVEES • Feather River, Yuba County: 13.5 miles of new levee construction and reinforcement; land net and right of ways • Bear River, Yuba County: 2.5 miles of levee reinforcement and improvements; land net and right of ways • Yuba River, Yuba County: 5.5 miles of levee reinforcement and improvements; land net and right of ways • West Sacramento/Yolo Basin Wetlands: Yolo Bypass, Tisdale Weir, American River and Sacramento River sites; topographic mapping, soundings, cross sections and structure details. PUBLIC WORKS/TRANSPORTATION • SR 88 Pine Grove, CA: Aerial survey control, topographic design surveys, land net/base mapping • SR12-SR26 Valley Springs, CA: topographic surveys, land net and right of ways • Silver Dove Way, Morrison Road &Tierra De Dios: 1.4 miles of roadway; land net and right of ways • Maybert Bridge Replacement Project: Topographic mapping, land net and right of ways • McKinley Avenue Bridge: hydrological cross sections LAND DEVELOPMENT AND SUBDIVISIONS • Valley View, El Dorado County, CA: 2,000 unit single family project • Euer Ranch, El Dorado County, CA: 461 unit single family project • Laguna Mirage, Sacramento, CA: 153 unit cluster home project • Carson Creek Ranch, El Dorado County, CA: 1,700 unit single family/senior project • Town Center East and West, El Dorado Hills, CA: Commercial, retail and office development. • La Crescenta Condominiums, Cameron Park, CA: Condominium conversion project • Pearl Place Condominiums, Shingle Springs, CA: Condominium project ALTA/ACSM LAND TITLE SURVEYS • University of California, Merced Campus: 10,000+ acres including topographic surveys, Record of Survey and exhibits. • Von Housen Mercedes Benz, Sacramento, CA: Auto dealership and adjacent office building • Residence Inn, Rancho Cordova, CA: Hotel site and off-site easement documentation • Rocklin Pointe, Rocklin, CA: Shopping center • Anderson Marketplace, Anderson, CA: Shopping center SPECIAL PROJECTS • Young vs. Lungren: Expert witness consultation related to easement litigation • Nixon vs. Snoke: Forensic surveys related to accident litigation • Tule River Indian Reservation: Establishment of geodetic control for future projects EDUCATION • California State University, Chico, California - Engineering, Industry and Technology - 1973-1975 PROFESSIONAL AFFILIATIONS • Surveyors, Architects, Geologist and Engineers (SAGE) of El Dorado County • California Land Surveyor's Association CEngineering &Surveying Givil Engineering• Land Surveying• Land Planning I jdh corrosion - -11k, c o n s u l t a n t s, i n c. "Protecting the infrastructure through innovative Corrosion Engineering Solutions" J. DARBY HOWARD, JR., P.E. • SUMMARY Over thirty-five (35) years of experience in all phases of corrosion projects including I/ design engineering, manufacturing, research and development, construction inspection services, construction management, sales and marketing and litigation i expert witness. Have successfully worked with clients in the fields of aerospace, marine, petroleum, chemical, mining and minerals, water and wastewater treatment EDUCATION and transmission, electric power industry, transportation systems, municipalities and Bachelor of Science— state and federal government agencies. Established a proven track record for the ability to manage and direct complex research and design projects, requiring the Civil/Structural Engineering, coordination of strict budgets and demanding schedules with engineering staff and University of Florida project teams. MBA Courses(2 years)- Northern Illinois University Special areas of expertise include cathodic protection design, installation, monitoring, troubleshooting, surveying,adjusting and repairing for underground pipelines, pile REGISTRATIONS supported structures, seawalls, retaining structures, marine vessels, storage tanks, condenser water boxes, cooling water lines, intake structures, traveling screens and ► Registered Professional Civil Engineer,CA water wells . Additional expertise in condition assessments of water/wastewater treat- (C44435) ment facilities and the diagnosis of internal and external corrosion problems associat ► Registered Professional Corrosion ed with copper piping systems such as thermogalvanic corrosion, high temperature Engineer,CA (CR1055) corrosion, velocity related corrosion and corrosion related to cold water pitting phe- ► Registered Professional Civil Engineer, NV nomena,failure analysis of building plumbing systems, conducting soil corrosivity stud- (019295) ies, expert witness for litigation support. ► Registered Professional Engineer, IL (inactive) PUBLICATIONS & SEMINARS EXPERIENCE ► Ali, M. & Howard Jr., J.D. Corrosion Investigation of Steel H-Piles. NACE Corrosion President/Owner Conference 1990. JDH Corrosion Consultants,Inc. ► California State Water Resources Control Board,Seminars throughout state,"Corrosion Concord,CA and Corrosion Control for Underground Storage Tanks", 1994-1995. 1995—Present ► Cal/Nev Section of AWWA, Fall Conference, 1994-1995, "Corrosion Control for Water Wells". District Manager ► San Francisco Bay Area NACE Conference, August, 1996, "Corrosion Concerns of Corrpro Companies the Water Industry". Hayward, CA ► California Water Environment Association, Northern Regional Conference, Sept., 1996, 1992—1995 "Metal Selection and Corrosion Control for Water and Soil Environments". ► American Society of Civil Engineers, Bay Area Geotechnical Committee, April 1999, President "Guidelines for Soil Corrosivity Testing and Laboratory Analysis". Corrosion Engineering&Research Co. ► East Bay Engineers Society, Fairfield, CA, Spring 2004 "What All Civil Engineers Concord,CA Should Know About Corrosion and Corrosion Control". 1987—1992 ► NACE Western Area Conference, Oct. 2008 "How to Conduct an Evaluation of Asbestos-Cement Pipe". Design/Project Engineer ► NACE Western Area Conference, Oct. 2008 "Case Study of Prestressed Chicago Bridge&Iron Company Precast Concrete Pile Failures". Oakbrook, IL&San Francisco,CA 1977—1985 W I Iiiii k on jdh c o n s u l tcorros a n t s, i i n c. 1 "Protecting the infrastructure through innovative It Corrosion Engineering Solutions" J. DARBY HOWAR � J.R. P%E.b (Continued) RELEVANT CONDITION ASSESSMENT PROJECT EXPERIENCE Project Name Agency Brief Description of Project Scope of Work Concrete Condition Delta Diablo Sanita- Conducted an inspection of the Screen Channel No. 1, Influent Assessment of Head- tion District Pipe from MH-1 and Grit Chamber Pump Room at the main works wastewater treatment facility located in Antioch, CA. Condition Assessment CCCSD Conduct a condition assessment of the following structures: Central Contra Costa Influent diversion struture Sanitary District Main Headworks metallic equipment Wastewater Treatment Pre-aeration tank#1 &#2 Plant Primary Sedimentation Tanks#1,#2&#3 Distribution channels north and south 60-inch Primary effluent pipeline and associated structures OC Building Facade 72-inch PE Pipeline Secondary Clarifiers North Nos. 1 -4 Secondary Clarifiers South Nos. 1 —4 Aeration Basin#2 AB Wet Well No.2 Five Wet Wells at South Tahoe PUD Performed an on-site corrosion evaluation of the subject rein- Pump Stations forced wet wells for the purpose of assessing the extent and 1 degree of any deterioration of the structures in order to determine the current condition of the structures as well as if repair work was warranted. We inspected both the wet side and dry side of L the pump station. _ Arden Pump Station Regional San A condition assessment of the wet well was performed on all of the wet well including influent channels,sluice gates, hand rails, concrete walls, manholes,and various appurtenances. San Mateo Wastewater City of San Mateo Performed a condition assessment of the reinforced concrete that Treatment Plant is exposed to wastewater in the Influent J-Box and provided rec- ommendations for remedial repair work based on findings. _ Thickeners Nos. 1 &2 USD Inspected the interior of both thickeners and made recommenda- tions for repair and recoating the thickeners Force Main Sewer Authority Mid- Conducted a condition assessment of a force main for SAMC. Coastside This assessment included an excavation and inspection of the _ Force Main. _ Force Main Rodeo Sanitary Dis- Conducted a condition assessment of a force main for RSD. This trict assessment included an excavation and inspection of the Force _ Main. _ Condition Assessment USD Conducted a condition assessment of 66,700 feet of 33-inch and 33-inch&39-inch Di- 39-inch diameter force mains owned and operated by Union San- ameter Sewer Force itary District. These force mains were installed in 1982 and they Mains convey raw wastewater from the Irvington Pump Station to the Newark Pump Station and on to the Alvarado Wastewater Treat- ment Plant in Union City,CA.